AngularJS is a very powerful JavaScript Framework. It is used in Single Page Application (SPA) projects. It extends HTML DOM with additional attributes and makes it more responsive to user actions. AngularJS is open source, completely free. Before you study AngularJS, you should have a basic understanding of:
AngularJS is distributed as a JavaScript file, and can be added to a web page with a script tag:
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<!doctype html>
<html ng-app>
<head>
<scriptsrc="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.3/angular.min.js"></script>
</head>
<body> <div> <label>Name:</label> <input type = "text" ng-model = "yourName" placeholder = "Enter a name here"> <hr /> <h1>Hello {{yourName}}!</h1> </div> </body> </html> The scope is the binding part between the HTML (view) and the JavaScript (controller). The scope is an object with the available properties and methods. The scope is available for both the view and the controller.
<script>
var mainApp = angular.module("mainApp", []);
mainApp.controller("shapeController",function($scope) {
$scope.message = "In shape controller";
$scope.type = "Shape";
});
</script>
All applications have a $rootScope which is the scope created on the HTML element that contains the ng-app directive. The rootScope is available in the entire application. If a variable has the same name in both the current scope and in the rootScope, the application use the one in the current scope.
<body ng-app="myApp">
<p>The rootScope's favorite color:</p>
<h1>{{color}}</h1>
<div ng-controller="myCtrl">
<p>The scope of the controller's favorite color:</p>
<h1>{{color}}</h1>
</div>
<p>The rootScope's favorite color is still:</p>
<h1>{{color}}</h1>
<script>
var app = angular.module('myApp', []);
app.run(function($rootScope) {
$rootScope.color = 'blue';
});
app.controller('myCtrl', function($scope) {
$scope.color = "red";
});
</script>
</body>
AngularJS supports the concepts of “Separation of Concerns” using services architecture. Services are javascript functions and are responsible to do a specific tasks only.
There are two ways to create a service.
var mainApp = angular.module("mainApp", []);
mainApp.factory('MathService', function() {
var factory = {};
factory.multiply = function(a, b) {
return a * b
}
return factory;
});
mainApp.service('CalcService',
function(MathService){
this.square = function(a) {
return MathService.multiply(a,a);
}
});
The $location service is very useful whenever you need to read or change the URL (or any part of it) in the browser. It can be configured to work in two modes: hashbang mode or HTML5 mode
This service allows you to map different URLs to different views and react whenever there’s a match between a URL and a defined route. To work with the $route service, we need the ngRoute module which can be found in the angular-route.js file.
For any query contact Clofus Innovations.
This section gives insight into the most important commands. There are many more commands than listed in this blog. Along with the individual commands, parameters are listed and, where appropriate, a typical sample application is introduced. To learn more about the various commands, use the manual pages,with these commands.
LINUX Commands
cat - Display file’s contents to the standard output device.
cd - Change to directory.
mkdir - This will create a new directory.
rm - The rm command will remove a specific file.
sudo - This command is used to give the root access to access files.
vi editor - Vi is the inbuilt linux text editor to write Source codes.
head - The head command prints the first line of the file.
tail - The tail command prints the last line of the file.
grep - This command is used to search the files or find text inside the file.
Syntax : grep text_to_find filename.
ping - Shows how long it takes for packets to reach host.
chmod - change file modes and to give file permission.
logout - Logs the current user off the system.
locate filename - Search a copy of your filesystem for the specified filename.
rmdir - delete empty directories.
kill - If the process refuses to stop, use kill -9 pid.
man - Display the help information for the specified command. lpr - Send a print job. ls - List directory contents.
For any query contact Clofus Innovations.
Bootstrap is a free front-end framework for faster and easier web development. Bootstrap includes HTML and CSS based design templates for typography, forms, buttons, tables, navigation, modals, image carousels and many other, as well as optional JavaScript plugins. Bootstrap also gives you the ability to easily create responsive designs.
Download Bootstrap
If you want to download and host Bootstrap yourself, go to getbootstrap.com, and follow the instructions there.
Bootstrap CDN If you don’t want to download and host Bootstrap yourself, you can include it from a CDN (Content Delivery Network). MaxCDN provides CDN support for Bootstrap’s CSS and JavaScript. You must also include jQuery:
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
1.A container
2.Rows
3.Columns
Bootstrap’s grid system needs a container to hold rows and columns.A container is a simple div element with a class of .container. The container is used to provide a proper width for the layout, acting as a wrapper for the content.You can choose a fluid container if you are not fond of a fixed layout.
A row acts like a wrapper around the columns. The row nullifies the padding set by the container element by using a negative margin value of -15px on both the left and right sides.A row spans from the left edge to the right edge of the container element. It is created by adding the class.A row to a block level element inside the container.
Bootstrap uses different column class prefixes for different sized devices. In the above demo, I used the class .col-xs-12 to create a single column that spans across 12 virtual Bootstrap columns. Hence, this column’s width will be the width of the row. In the above demo, you will also see the 15px padding reappear to push the element away from the container. This is because every column in Bootstrap has a padding of 15px. You must be wondering why I used the class prefix that belonged to extra smaller devices, which is .col-xs-12.This way, we maintain the limit of 12 virtual Bootstrap columns for a single row.
<div class="row">
<div class="col-sm-4">.col-sm-4</div>
<div class="col-sm-4">.col-sm-4</div>
<div class="col-sm-4">.col-sm-4</div>
</div>
This is for three equal columns.then,
To apply grid for multiple devices simultaneously, include them together in the classes.
<div class="container-fluid">
<h1>Grid Responsive using bootstrap :</h1>
<hr>
<div class="row" >
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:red" >
<p>1st grid to display</p>
</div>
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:blue">
<p>2nd grid to display</p>
</div>
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:grey">
<p>3rd grid to display</p>
</div>
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:green" >
<p>4th grid to display</p>
</div>
</div>
</div>
For any query contact Clofus Innovations.
To get started, head over to the Docker documentation pages for instructions on how to install Docker on your OS. The instructions differ depending on your OS:
If you are running OS X or Windows, you can’t install Docker directly, since it requires a Linux host to create containers. Luckily the Boot2Docker project was built to specifically fill this void.
Using the Dockerfiles is as simple as having the docker daemon run one. The output after executing the script will be the ID of the new docker image.
Build an image using the Dockerfile at current location
Example: sudo docker build -t [name] .
sudo docker build -t my_mongodb .
Using the nano text editor, let’s start editing our Dockerfile.
sudo nano Dockerfile
Set the base image to Ubuntu
FROM ubuntu
File Author / Maintainer
MAINTAINER Example McAuthor
docker build -t myprojectimage .
docker run -it -v C:\Users\Clofus1\Documents\myprojects:/srv/myprojectsfolder -dp 80:80 -p 27017:27017 --name myprojectcontainer myprojectimage
docker exec -it <cid> bash
docker stop <cid>
docker rm <cid>
docker rmi <image id>
docker ps
docker ps -aFor any query contact Clofus Innovations.
Each file or directory have three set of permissions. Owner permission, group permission, everyone permission.
Each permission have three set of actions. read, write and execute. Users can change permission of each file in linux operating system.
Type this command in your linux terminal
$ ls -l
Now all files and directory in present working directory, display with their corresponding permission like shown as below:
-rw-r-xr-x 1 root root 382 Apr 18 22:24
sample.txt
drw-r--r-- 1 root root 382 Apr 18 22:24
sample
-rw-r-xr-x 1 root root 382 Apr 18 22:24
clofus.md
Type this command in your linux terminal
$ chmod -R 755 < folder or file path >
_ _
Read = 4, write = 2, execute = 1
755 denotes file permission of folder or file. - 7 - owner permission, ( 4+ 2 + 1 = 7 ). It means owner of file have permission to read, write and execute. - 5 - group permission, ( 4+ 0 + 1 = 7 ). It means users in group have permission to read, execute only. They are not allow to edit this file. - 5 - everyone permission, ( 4+ 0 + 1 = 7 ). It means every other linux users in the operating system have permission to read, execute only. They are not allow to edit this file.
For more permission is listed below:
7 = read + write + execute
6 = read + write
5 = read + execute
4 = read only
3 = write and execute only
2 = write only
1 = execute only
For any query contact Clofus Innovations.
Git is the most popular version control system as we all know all and used to track and share code between team members but here is our swiss army knife of git commands useful whenever you want them available handy
git config Sets configuration values for your user name, email, gpg key, preferred diff algorithm, file formats and more.
git init Initializes a git repository – creates the initial ‘.git’ directory in a new or in an existing project.
git clone Makes a Git repository copy from a remote source. Also adds the original location as a remote so you can fetch from it again and push to it if you have permissions.
git add Adds files changes in your working directory to your index.
git rm Removes files from your index and your working directory so they will not be tracked.
git commit Takes all of the changes written in the index, creates a new commit object pointing to it and sets the branch to point to that new commit.
git merge Merges one or more branches into your current branch and automatically creates a new commit if there are no conflicts.
git reset Resets your index and working directory to the state of your last commit.
git stash Temporarily saves changes that you don’t want to commit immediately. You can apply the changes later.
git tag Tags a specific commit with a simple, human readable handle that never moves.
git remote Shows all the remote versions of your repository.
git log Shows a listing of commits on a branch including the corresponding details.
git show Shows information about a git object.
git ls-tree Shows a tree object, including the mode and the name of each item and the SHA-1 value of the blob or the tree that it points to.
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Installing Node js is pretty straightforward using the installer package.
Installation Steps
1) Download node js (nodejs.org) and install
2) open cmd and directed to nodejs path
3) Type npm,if it shows error, Do the following steps
4) Go to my Computer left click on it and go to the properties
5) Click advance system setting
6) click environment variable
7) new path value=“C:\Users\clofus\AppData\Roaming\npm; C:\Program Files (x86)\nodejs” now it will give access to the npm
For any query contact Clofus Innovations.
If you’ve been working with JavaScript for a while, you might have heard of npm: npm makes it easy for JavaScript developers to share the code that they’ve created to solve particular problems, and for other developers to reuse that code in their own application.
1) npm install
2) npm install grunt
3) bower install
4) grunt buildprod
5) grunt builddev
During the installation of bower , may show the error unable to connect to github. Enter the cmd bower install again in same command prompt.
It will install the npm package and allows to use globally.
It will install the corresponding package and save it in node modules and list an entry in dependencies in package.jason file.
Node comes with npm installed so you should have a version of npm. However, npm gets updated more frequently than Node does, so you’ll want to make sure it’s the latest version.
npm install npm@latest -g
For more advanced users. The npm module is available for download at
https://registry.npmjs.org/npm/-/npm-{VERSION}.tgz.
Example:
{
“name”: “clofus”,
“version”: “0.1.0”,
“devDependencies”: {
“esprima”: “~1.0.4”,
“grunt”: “^0.4.5”,
“grunt-bower-concat”: “^0.4.0”,
“grunt-concat-css”: “^0.3.1”,
“grunt-contrib-clean”: “~0.5.0”,
“grunt-contrib-concat”: “~0.4.0”,
“grunt-contrib-copy”: “^0.7.0”,
“grunt-shell”: “^1.1.2”,
“grunt-stripcomments”: “^0.3.1”,
“grunt-uncss”: “^0.4.0”,
“grunt-wiredep”: “^2.0.0”,
“load-grunt-tasks”: “^1.0.0”
},
“dependencies”: {
“express”: “^4.13.3”,
“grunt-aws”: “^0.4.0”,
“grunt-aws-s3”: “^0.11.1”,
“grunt-banner”: “^0.3.1”,
“grunt-bower-concat”: “^0.4.0”,
“grunt-ng-annotate”: “^0.8.0”,
“grunt-processhtml”: “^0.3.7”,
“grunt-shell”: “^1.1.2”,
“grunt-stripcomments”: “^0.3.1”,
“grunt-uncss”: “^0.4.0”,
“load-grunt-tasks”: “^1.0.0”
}
}
The npm Open Source Terms at https://www.npmjs.com/policies/open-source-terms govern use of https://www.npmjs.com and the npm public registry. The npm Private Packages Terms at https://www.npmjs.com/policies/private-terms govern use of npm Private Packages. The npm Personal Payment Plan https://www.npmjs.com/policies/personal-plan and the npm Organization Payment Plan https://www.npmjs.com/policies/organization-plan govern payment for npm Private Packages.
For any query contact Clofus Innovations.
SQL and NOSQL databases are two main types of databases. The main difference between the two databases, depends on how they store and retrieve data.
SQL databases are called as Relational databases, the data you’re storing in it has to be structured in a very organized way.
SQL databases have predefined schema structure and SQL databases uses SQL ( structured query language ) for defining and manipulating the data, which is very powerful.
SQL databases is not fit for large storage and not well defined data schema.
Most popular SQL Databases
NOSQL databases are called as non relational databases. NOSQL databases are unstructured and dynamic data schemes.
NOSQL databases are more flexible than sql databases for updating data design schema and the data are store in the hierarchical manner.
NOSQL databases have capacity to handle large numbers of data. But the manipulating data in nosql databases is poor when compared to SQL databases.
NOSQL database can store text, files, images and graphs.
Most popular SQL Databases
For any query contact Clofus Innovations.
1) Create Input Training Data & its traning input function
2) Create Input Test Data & its testing input function
3) Choose feature columns and existing Classifier or custom Classifier
4) Train and Test the Model using Classifier
5) Perform Prediction using the model
We need to make sure we have good quality data for the machine learning model to perform accurate prediction, more the traning data better the model prediction outcome will be.
In this example we will use the commonly used iris training data which comes in a simple csv file with 4 features and species as the fifth column
In the below code we are reading the CSV data in a pandas dataframe and splitting the entire data in to two seperate set which will be used for traning and testing seperately
inputdata = pd.read_csv(DATAPATH, names=ALL_CSV_COLUMNS, header=0)
train_x, test_x, train_y, test_y = sk.train_test_split(inputdata.loc[:,FEATURE_COLUMNS], inputdata.loc[:,'Species'],test_size=0.10)
Now input function is used to properly feed the data in batches to the tensorflow classifier
def train_input_fn(features, labels, batch_size):
# Convert the inputs to a Dataset.
dataset = tf.data.Dataset.from_tensor_slices((dict(features), labels))
# Shuffle, repeat, and batch the examples.
dataset = dataset.shuffle(1000).repeat().batch(batch_size)
# Return the dataset.
return dataset
Now using the split testing data we can now do the same input function for evaluation or testing function, also here we have option for both labeled and non labeled testing dataset
def eval_input_fn(features, labels, batch_size):
features=dict(features)
if labels is None:
# No labels, use only features.
inputs = features
else:
inputs = (features, labels)
# Convert the inputs to a Dataset.
dataset = tf.data.Dataset.from_tensor_slices(inputs)
# Batch the examples
assert batch_size is not None, "batch_size must not be None"
dataset = dataset.batch(batch_size)
# Return the dataset.
return dataset
Now we are selecting the feature column names for the classifier and choose real valued numeric data for the feature columns
my_feature_columns = []
for key in train_x.keys():
my_feature_columns.append(tf.feature_column.numeric_column(key=key))
Choose an appropriate classifier for the given data for best results, below we are using DNNClassifier
# Evaluate the model.
classifier = tf.estimator.DNNClassifier(
feature_columns=my_feature_columns,
hidden_units=[10, 10],
n_classes=3)
Now lets train and test the classifier using the above DNNClassifier and input functions
#Train the Model.
classifier.train(
input_fn=lambda:train_input_fn(train_x, train_y, batch_size),
steps=train_steps)
# Evaluate the model.
eval_result = classifier.evaluate(
input_fn=lambda:eval_input_fn(test_x, test_y, batch_size))
print('\nTest set accuracy: {accuracy:0.3f}\n'.format(**eval_result))
On the final step, the model is now ready for the prediction. we will use a predetermined set of input data to verify the accuracy of the model
# Generate predictions from the model
expected = ['Setosa', 'Versicolor', 'Virginica']
predict_x = {
'SepalLength': [5.1, 5.9, 6.9],
'SepalWidth': [3.3, 3.0, 3.1],
'PetalLength': [1.7, 4.2, 5.4],
'PetalWidth': [0.5, 1.5, 2.1],
}
predictions = classifier.predict(
input_fn=lambda:eval_input_fn(predict_x, labels=None, batch_size=batch_size))
The outcome of the prediction is returned as a generator object which can be iterated to see our results
for pred_dict, expec in zip(predictions, expected):
template = ('\nPrediction is "{}" ({:.1f}%), expected "{}"')
class_id = pred_dict['class_ids'][0]
probability = pred_dict['probabilities'][class_id]
print(template.format(SPECIES[class_id], 100 * probability, expec))
I hope we were able to explain the tensorflow high level API in a very simple step by step approach and please feel free to contact support@clofus.com for any queries thanks
The Chrome Developer Tools (Devtools for short), are a set of web authoring and debugging tools built into Google Chrome. The Devtools provide web developers deep access into the internals of the browser and their web application. Use the Devtools to efficiently track down layout issues, set JavaScript breakpoints, and get insights for code optimization Overall, there are eight main groups of tools available view Developer Tools:
The elements consists of the html code corresponding to the document and it also has the CSS code in the right side which is very much helpful for the front-end designers to efficiently design the webpage.
The resources section consists of the local storage, Whenever the browser refreshes the data stored will be replace with new data from the server. In order to use the data for further processing they can be stored to the local storage as a temporary files.
In Network section used to view the network calls between the server and the client. It displays every time when the network call initiated between the server and the client. 
Source section used to view the Source files of the corresponding files. This section allows specifically set the breakpoints between the codes to run particular part and verify for errors. 
The Profiles panel lets you profile the execution time and memory usage of a web app or page. The Profiles panel includes two profilers: a CPU profiler and a Heap profiler. These help you to understand where resources are being spent, and so help you to optimize your code:
The console section consists of the error logs and it act as an output screen to check the printed values of the variables.
For any query contact Clofus Innovations.
MongoDB is an open-source document database that provides high performance, high availability, and automatic scaling. MongoDB obviates the need for an Object Relational Mapping (ORM) to facilitate development.
MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need
Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast and scalable network applications.
It is the Mongodb framework which is used to connect nodejs with mongodb database.
1) To install mongoose in nodejs use npm package: sh npm install mongoose
2) Link mongoose with Nodejs server: sh var mongoose = require('mongoose');
3) To connect a new MongoDB database: sh mongoose.connect('mongodb://localhost/database_name');
Create Model for collection
Example :
var reg = mongoose.model('register', //collection name
{
field1 : {type:String}, //string value
field2 : {type:Number}, //number value
field3 : {type: Object}, //json object value
field4 : {type: Date}, //datetime value
field5 : {type: Boolean}, //Boolean value true/false
field6 : {type: String, required: true}, // string value must enter the value
field7 : {type: Number, default: 0}, //number value with default of '0' value
field8 : {type: String, enum: ["active", "inactive","block"], default: "inactive"}, //string value which contain in enum array
field9 : {type: Schema.Types.ObjectId, ref: 'modelName'} //object_id of reference of another model
});
To store the values into the mongodb server use the following syntax
Syntax :
objectname.save(function (err,data){
//callback content
});
Example :
var details = new reg(JSON_document);
details.save(function (err,data) { //insert to mongodb database
if (err) {
console.log('Error block');
} else {
console.log('Success block')
}
});
To Find data from the mongodb database use the following query i) To get only one data from database use below syntax or example
Syntax :
reg.findOne({},function(err,data){
//callback content
});
Example :
reg.findOne({key : value},function(err,data){
res.send(data); // send response
});
ii) To get multiple data as array from database use below syntax or example
Syntax :
reg.find({},function(err,data){
//callback content
});
Example :
reg.find({key : value},function(err,data){
res.send(data); // send response
});
To Update data in mongodb database collection i) Normal update
Syntax :
reg.update(QUERY_VALUE, UPDATE_VALUE).exec(function(err,value){
if(err){
console.log("Error block")
}else{
console.log("Success block")
}
});
Example :
reg.update({key:value}, {key1:value1,key2: value2}).exec(function(err,value){
if(err){
console.log("Error block")
}else{
console.log("Success block")
}
});
ii) Find and update By default findOneAndUpdate returns the original document. If you want it to return the modified document pass an options object { new: true } to the function
Syntax :
reg.findOneAndUpdate({FIND_VALUE},{UPDATE_VALUE},{OPTIONAL},
function(err, content){
if(!err){
res.json({status: "success", data: value});
}else{
res.json({status:"error"});
}
});
Example :
reg.findOneAndUpdate({key: value},
{key1: value1, key2: value2}, {new: true}, function(err, doc){
if(err){
console.log("Error block");
}else{
console.log("Success block");
}
});
NOTE: if optional json contain {new:true} - it will return updated document details if optional json not contain or contain {new:false} - if will return old value
To delete a data collection from mongodb database:
i) Normal delete data from collection:
Syntax :
reg.remove(QUERY_VALUE);
Example :
reg.remove({key:value});
ii) Find and remove data from collection: Syntax :
reg.find({QUERY_VALUE}).remove().exec();
Example :
reg.find({key: value}).remove().exec();
iii) Drop collection from mongodb database: Syntax :
Collection_name.drop();
Example :
reg.drop();
For any query contact Clofus Innovations.
MySQL is one of the best RDBMS being used for developing web-based software applications and in this article we will cover about using nodejs for CRUD operations with MySQL database with a step by step approach with code examples
Nodejs is a platform built on Chrome’s JavaScript runtime for easily building fast and scalable network applications.
1) To install MySQL in nodejs use npm package:
npm install mysql
2) Link MySQL with Nodejs server
var mysql = require('mysql');
3) To create a new MySQL database and table - Create database: Creating separate space in MySQL
Syntax:
create database <DB_Name>;
Use database: To use the created Database
Syntax:
use <DB_Name>;
Create Table: Creating table in Database
Syntax:
create table <TableName>(Column1 Datatype,Column2 Datatype,...);
Connect MySQL and Nodejs:
MySQL configuration
Example :
var connection = mysql.createConnection({ // creating connection string
host : 'localhost', //host name
user : 'root', // mySQL username
password : '', // mySql Password
database : 'db_name' // database Name
});
connecting with nodejs
Example :
connection.connect(function(err){
if(!err) {
console.log("Database is connected ... ");
} else {
console.log("Error connecting database ... ");
}
});
Insert table: Insert data in created table
Syntax:
insert into <TableName> values('string_data',integer_data,....);
Example:
connection.query("insert into user values("+value1+",'"+value2+"',"+value2+",'" value4+'")",
function(err, rows, fields) { // INSERT query in nodejs file
connection.end();
if (!err)
console.log('The solution is: ', rows);
else
console.log('Error while performing Query.');
});
Select table: To retrieve data from table
i) Syntax for access all Rows :
select * from <TableName>; (or) select <column_name> from <TableName>;
ii) Syntax for access particular Rows :
select * from <TableName> where <column_name>='<user_data'>;
Example :
var query="select * from db_name where column1='"+value1+"' and column2='"+value2+"'";
connection.query(query, function(err, rows, fields) { // SELECT query in nodejs file
connection.end();
if (!err){
console.log('The solution is: ', rows);
} else {
console.log('Error while performing Query.');
}
});
Update table: Syntax for update row:
update <TableName> set <update_columnName> = <update_value> where <column_name>='<user_data'>;
Example:
var query="update db_name set updatecolumn='"+updatevalue+"'
where conditioncolumn='"+conditionvalue+"'";
connection.query(query, function(err, rows, fields) { // SELECT query in nodejs file
connection.end();
if (!err)
console.log('The solution is: ', rows);
else
console.log('Error while performing Query.');
});
Delete table: To delete data or table
i) Syntax for delete all data:
delete table <TableName>;
ii) Syntax for delete particular data:
delete table <TableName> where <columnName>="<userdata>";
Example:
var query="delete table db_name where column1='"+value1;
connection.query(query, function(err, rows, fields) { // SELECT query in nodejs file
connection.end();
if (!err){
console.log('The solution is: ', rows);
}else{
console.log('Error while performing Query.');
}
});
The AVG function calculates the average value of a set of values. It ignores NULL values in the calculation.
Syntax:
select AVG(<ColumnName) from <TableName>;
The COUNT function returns the number of the rows in a table.
Syntax:
select COUNT(*) from <TableName> (or) select COUNT(<columnName>) from <TableName>;
The SUM function returns the sum of a set of values.
Syntax:
select SUM(<ColumnName>) from <TableName>;
The MIN function returns the minimum value in a set of values.
Syntax:
select MIN(<ColumnName>) from <TableName>;
The MAX function returns the maximum value in a set of values.
Syntax:
select MAX(<ColumnName>) from <TableName>;
For any query contact Clofus Innovations.
Building web application using programming languages like PHP, JavaScript etc., get outdated. Already many companies and agencies who involved in developing web-related software/application have migrated to the new technology called AngularJS and NodeJS. Now it has become very popular technology term between tech peoples and there is a lot of scope to the beginners who learn AngularJS with NodeJS.
This complete tutorial will be very useful and easy to the beginners who passionate to learn AngularJS/NodeJS and build a responsive web application and you don’t need to take any courses to crack this technology. You will learn everything about building web application using Angular and NodeJS
Before you start building Web application you should have a basic understanding of
Next, you need to learn some installations process
If you’ve been working with JavaScript for a while, you might have heard of npm: npm makes it easy for JavaScript developers to share the code that they’ve created to solve particular problems, and for other developers to reuse that code in their own application.
1) npm install
2) npm install grunt
3) bower install
4) grunt buildprod
5) grunt builddev
During the installation of bower, may show the error unable to connect to GitHub. Enter the cmd bower install again in same command prompt.
It will install the npm package and allows to use globally.
It will install the corresponding package and save it in node modules and list an entry in dependencies in package.jason file.
Node comes with npm installed so you should have a version of npm. However, npm gets updated more frequently than Node does, so you’ll want to make sure it’s the latest version.
npm install npm@latest -g
For more advanced users. The npm module is available for download at
https://registry.npmjs.org/npm/-/npm-{VERSION}.tgz.
{
"name": "clofus",
"version": "0.1.0",
"devDependencies": {
"esprima": "~1.0.4",
"grunt": "^0.4.5",
"grunt-bower-concat": "^0.4.0",
"grunt-concat-css": "^0.3.1",
"grunt-contrib-clean": "~0.5.0",
"grunt-contrib-concat": "~0.4.0",
"grunt-contrib-copy": "^0.7.0",
"grunt-shell": "^1.1.2",
"grunt-stripcomments": "^0.3.1",
"grunt-uncss": "^0.4.0",
"grunt-wiredep": "^2.0.0",
"load-grunt-tasks": "^1.0.0"
},
"dependencies": {
"express": "^4.13.3",
"grunt-aws": "^0.4.0",
"grunt-aws-s3": "^0.11.1",
"grunt-banner": "^0.3.1",
"grunt-bower-concat": "^0.4.0",
"grunt-ng-annotate": "^0.8.0",
"grunt-processhtml": "^0.3.7",
"grunt-shell": "^1.1.2",
"grunt-stripcomments": "^0.3.1",
"grunt-uncss": "^0.4.0",
"load-grunt-tasks": "^1.0.0"
}
}
Bootstrap is a free front-end framework for faster and easier web development. Bootstrap includes HTML and CSS based design templates for typography, forms, buttons, tables, navigation, modals, image carousels and many other, as well as optional JavaScript plugins. Bootstrap also gives you the ability to easily create responsive designs.
If you want to download and host Bootstrap yourself, go to getbootstrap.com, and follow the instructions there.
If you don’t want to download and host Bootstrap yourself, you can include it from a CDN (Content Delivery Network). MaxCDN provides CDN support for Bootstrap’s CSS and JavaScript. You must also include jQuery:
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"
1.A container
2.Rows
3.Columns
Bootstrap’s grid system needs a container to hold rows and columns.A container is a simple div element with a class of .container. The container is used to provide a proper width for the layout, acting as a wrapper for the content.You can choose a fluid container if you are not fond of a fixed layout.
A row acts like a wrapper around the columns. The row nullifies the padding set by the container element by using a negative margin value of -15px on both the left and right sides.A row spans from the left edge to the right edge of the container element. It is created by adding the class.A row to a block level element inside the container.
Bootstrap uses different column class prefixes for different sized devices. In the above demo, I used the class .col-xs-12 to create a single column that spans across 12 virtual Bootstrap columns. Hence, this column’s width will be the width of the row. In the above demo, you will also see the 15px padding reappear to push the element away from the container. This is because every column in Bootstrap has a padding of 15px. You must be wondering why I used the class prefix that belonged to extra smaller devices, which is .col-xs-12.This way, we maintain the limit of 12 virtual Bootstrap columns for a single row.
<div class="row">
<div class="col-sm-4">.col-sm-4</div>
<div class="col-sm-4">.col-sm-4</div>
<div class="col-sm-4">.col-sm-4</div>
</div>
This is for three equal columns.then,
To apply grid for multiple devices simultaneously, include them together in the classes.
<div class="container-fluid">
<h1>Grid Responsive using bootstrap :</h1>
<hr>
<div class="row" >
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:red" >
<p>1st grid to display</p>
</div>
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:blue">
<p>2nd grid to display</p>
</div>
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:grey">
<p>3rd grid to display</p>
</div>
<div class="col-md-3 col-sm-6 col-xs-12" style="background-color:green" >
<p>4th grid to display</p>
</div>
</div>
</div>
Before we use a function, we need to define it. The most common way to define a function in JavaScript is by using the function keyword, followed by a unique function name, a list of parameters (that might be empty), and a statement block surrounded by curly braces.
function functionName(parameters) {
code to be executed
}
A JavaScript function can also be defined using an expression.
Example:
<script>
var x = function (a, b) {return a * b};
document.getElementById("demo").innerHTML = x;
</script>
As you have seen in the previous examples, JavaScript functions are defined with the function keyword. Functions can also be defined with a built-in JavaScript function constructor called Function().
var myFunction = new Function("a", "b", "return a * b");
document.getElementById("demo").innerHTML =
myFunction(4, 3);
JavaScript function definitions do not specify data types for parameters. JavaScript functions do not perform type checking on the passed arguments. JavaScript functions do not check the number of arguments received.
If a function is called with missing arguments (less than declared), the missing values are set to ‘undefined’.
function myFunction(x, y) {
if (y === undefined) {
y = 0;
}
return x * y;
}
You have already learned that the code inside a JavaScript function will execute when “something” invokes it. The code in a function is not executed when the function is defined. It is executed when the function is invoked. It is also quite common to say “call upon a function”, “start a function”, or “execute a function”.
Example:
function myFunction(a, b) {
return a * b;
}
myFunction(10, 2);
In JavaScript, you can define the function as object methods.
Example:
var myObject = {
firstName:"John",
lastName: "Doe",
fullName: function () {
return this.firstName + " " + this.lastName;
}
}
myObject.fullName();
A function can access all variables defined inside the function.
Example:
function myFunction() {
var a = 4;
return a * a;
}
In the last example, a is a global variable. In a web page, global variables belong to the window object.
Suppose you want to use a variable for counting something, and you want this counter to be available to all functions. You could use a global variable, and a function to increase the counter:
Example:
var counter = 0;
function add() {
counter += 1;
}
add();
add();
add();
All functions have access to the global scope. JavaScript supports nested functions. Nested functions have access to the scope “above” them. In this example, the inner function plus() has access to the counter variable in the parent function:
function add() {
var counter = 0;
function plus() {counter += 1;}
plus();
return counter;
}
AngularJS is a very powerful JavaScript Framework. It is used in Single Page Application (SPA) projects. It extends HTML DOM with additional attributes and makes it more responsive to user actions. AngularJS is open source, completely free.
AngularJS is distributed as a JavaScript file, and can be added to a web page with a script tag:
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<!doctype html>
<html ng-app>
<head>
<scriptsrc="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.3/angular.min.js"></script>
</head>
<body>
<div>
<label>Name:</label>
<input type = "text" ng-model = "yourName" placeholder = "Enter a name here">
<hr />
<h1>Hello {{yourName}}!</h1>
</div>
</body>
</html>
The scope is the binding part between the HTML (view) and the JavaScript (controller). The scope is an object with the available properties and methods. The scope is available for both the view and the controller.
<script>
var mainApp = angular.module("mainApp", []);
mainApp.controller("shapeController",function($scope) {
$scope.message = "In shape controller";
$scope.type = "Shape";
});
</script>
All applications have a $rootScope which is the scope created on the HTML element that contains the ng-app directive. The rootScope is available in the entire application. If a variable has the same name in both the current scope and in the rootScope, the application uses the one in the current scope.
<body ng-app="myApp">
<p>The rootScope's favorite color:</p>
<h1>{{color}}</h1>
<div ng-controller="myCtrl">
<p>The scope of the controller's favorite color:</p>
<h1>{{color}}</h1>
</div>
<p>The rootScope's favorite color is still:</p>
<h1>{{color}}</h1>
<script>
var app = angular.module('myApp', []);
app.run(function($rootScope) {
$rootScope.color = 'blue';
});
app.controller('myCtrl', function($scope) {
$scope.color = "red";
});
</script>
</body
AngularJS supports the concepts of “Separation of Concerns” using services architecture. Services are javascript functions and are responsible to do specific tasks only.
There are two ways to create a service.
var mainApp = angular.module("mainApp", []);
mainApp.factory('MathService', function() {
var factory = {};
factory.multiply = function(a, b) {
return a * b
}
return factory;
});
mainApp.service('CalcService',
function(MathService){
this.square = function(a) {
return MathService.multiply(a,a);
}
});
The $location service is very useful whenever you need to read or change the URL (or any part of it) in the browser. It can be configured to work in two modes: hashbang mode or HTML5 mode
This service allows you to map different URLs to different views and react whenever there’s a match between a URL and a defined route. To work with the $route service, we need the ngRoute module which can be found in the angular-route.js file.
Angularjs directive are extended HTML attributes with the prefix ‘ng’,
The ng-app directive initializes an Angularjs Application. The ng-init directive initializes application data.
Example: ng-init=“names=[‘Jani’,‘Hege’,‘Kai’]”
The ng-model directive binds the value of HTML controls(input, select, textarea) to application data.
Node js is an open source, server-side( back-end) java-script platform which is used to connect client side to the server database. It is single threaded, Non-blocking I/O (Each line is executed separately irrespective of depending upon the other inputs). Before proceeding download and configure node js. (Check-in setup development environment for installation procedure).
Express is a very popular web application framework built to create Node JS Web-based applications. Install express on the local computer by the following command
npm install express --save
Above command saves installation locally in
node_modules directory and creates a directory express inside node_modules.
File name : server.js
var express = require('express'); //Express framework included in the server.js file
var app = express();
app.get('/', function (req, res) {
res.send('Hello World');
})
app.listen(3000); // server listening port
Note : Save this file as a server.js open command prompt enter node server.js to run the server. (configure in nginx for the client side )
Express application makes use of a callback function whose parameters are request and response objects.
app.get('/', function (req, res) {
// --
})
Response Object - The response object represents the HTTP response that an Express app sends when it gets an HTTP request.
Routing refers to determining how an application responds to a client request to a particular endpoint, which is a URI (or path) and a specific HTTP request method (GET, POST, PUT, DELETE)
This can be done by using several methods. They are called as Rest Architecture. What is REST architecture?
REST stands for Representational State Transfer. REST is web standards-based architecture and uses HTTP Protocol. A REST Server simply provides access to resources and REST client accesses and modifies the resources using HTTP protocol. It usually was done using JSON format
1)GET Method - This is used to provide a read-only access to a resource.
2)PUT Method - This is used to create a new resource.
3)POST Method - This is used to update an existing resource or create a new resource.
4)DELETE Method - This is used to remove a resource.
app.get('/mainpage', function(req, res){
//This is the get method which will Route to the mainpage
// The below line requesting data from mysql database
connection.query('SELECT * FROM tablename', function(err, rows){
console.log("data send to frontpage");
res.send(rows); //It will send response to corresponding http method in angular js
});
app.post('/mainpage', function(req, res){
// The below line requesting data from mysql database
connection.query('SELECT * FROM tablename', function(err, rows){
console.log("data send to frontpage");
res.send(rows); //It will send response to corresponding http method in angular js
});
//This will insert the data
app.put('/mainpage', function(req, res){
// The below line inserting data from mysql database
connection.query('insert into tablename value ('name')', function(err, rows){
});
//This will delete the data in the resource
app.delete('/mainpage', function(req, res){
//This is the delete method which will Route to the main page
// The below line deleting data from mysql database
connection.query('Delete from tablename', function(err, rows){
});
This Res.send function is used to send the data to client side http method of Angular Js.
For Example:
app.post('/mainpage', function(req, res){
res.send('Hello world'); //It will send response to corresponding http method in angular js
});
This res.send(‘Hello world’) will send the hello world text to the client side HTTP method of the angular js.
Send the data from client side to server side by using a query parameter.
For Example:
Clent side request
app.controller('mainctl',function($scope,$http,$routeParams){
$http({
method: 'GET',
url:'http://localhost:2901/mainpage',
params: { //query parameter send data with the help of params
urname(this is key):$routeParams.uid(this is value) //params data will attach as query like http://localhost:2901/mainpage?urname='data'
}
}).then (function(res){
console.log(res.data);
})
})
Server side receiving request and response to client.
app.get('/mainpage', function(req, res){ // request received from client side
console.log("using Query")
console.log(req.query); //to access the query parameter use(req.query or req.query.urname(use key))
reg.find(req.query,function(err,data){ //request sent to mongodb and result will be stored in data parameter
res.send(data); //response will send to client request.
});
});
Send the data from client side to server side by using Params.
For Example:
Client Side Request: app.controller('mainctl',function($scope,$http,$routeParams){
$http({
method: 'GET',
url:'http://localhost:2901/mainpage/'+$routeParams.uid(this is value) // value will send to server through url
}).then (function(res){
console.log(res.data);
})
})
Server side receiving request and response to client.
app.get('/mainpage/:urname', function(req, res){ // request received from client side
console.log("using Param")
console.log(req.params); //to access the query parameter use(req.params or req.params.urname)
reg.find(req.query,function(err,data){ //request sent to mongodb and result will be stored in data parameter
res.send(data); //response will send to client request.
});
});
Body is used to send data securely(i.e., hide information and send a request to the server). Important things to follow while using body parameter. install body-parse.use(bodyParser.json()) - after using this line only body will accept body request from client.
For Example:
Client side:app.controller('signinctrl',function($scope,$http,$location){
$scope.send data=function(user){ //user input all store in json type
$http({
method: 'POST',
url: 'http://localhost:2901/signin',
data:user // data information pass through body parameter
}).then(function(res) {
console.log(res.data);
})
}
})
Server Side:
var express = require('express'); //using express package
var bodyParser = require('body-parser'); // using body-parser package without this data will not work in body parameters
var mongoose = require('mongoose'); // using mongoose package
var app = express();
app.use(bodyParser.json()); //access for json files
app.post('/signin',function(req,res){
console.log("Using Body Method")
console.log(req.body); // access body information using req.body
reg.find(req.body,function(err,data){ //request result will store in data parameter
res.send(data); // response will send to client resquest
});
})
A header is used give access control for client-side request and response.
For Example:
app.all('*',function(req,res,next){ //* represent access control to all app using methods.
console.log("Allow header access");
res.header('Access-Control-Allow-Origin', '*'); //origin access control
res.header('Access-Control-Allow-Methods', 'GET,POST,PUT,DELETE'); //method access control
res.header('Access-Control-Allow-Headers', 'Content-Type'); // header access control (json, text/plain,..)
next();
})
MongoDB is an open-source document database that provides high performance, high availability, and automatic scaling. MongoDB obviates the need for an Object Relational Mapping (ORM) to facilitate development.
MongoDB is a document database with the scalability and flexibility that you want with the querying and indexing that you need
Node.js is a platform built on Chrome’s JavaScript runtime for easily building fast and scalable network applications.
It is the MongoDB framework which is used to connect nodejs with MongoDB database.
1) To install mongoose in nodejs use npm package: sh npm install mongoose
2) Link mongoose with Nodejs server: sh var mongoose = require('mongoose');
3) To connect a new MongoDB database: sh mongoose.connect('mongodb://localhost/database_name');
Create Model for collection
Example :
var reg = mongoose.model('register', //collection name
{
field1 : {type:String}, //string value
field2 : {type:Number}, //number value
field3 : {type: Object}, //json object value
field4 : {type: Date}, //datetime value
field5 : {type: Boolean}, //Boolean value true/false
field6 : {type: String, required: true}, // string value must enter the value
field7 : {type: Number, default: 0}, //number value with default of '0' value
field8 : {type: String, enum: ["active", "inactive","block"], default: "inactive"}, //string value which contain in enum array
field9 : {type: Schema.Types.ObjectId, ref: 'modelName'} //object_id of reference of another model
});
To store the values into the MongoDB server use the following syntax
Syntax :
objectname.save(function (err,data){
//callback content
});
Example :
var details = new reg(JSON_document);
details.save(function (err,data) { //insert to mongodb database
if (err) {
console.log('Error block');
} else {
console.log('Success block')
}
});
To Find data from the MongoDB database use the following query i) To get only one data from database use below syntax or example
Syntax :
reg.findOne({},function(err,data){
//callback content
});
Example :
reg.findOne({key : value},function(err,data){
res.send(data); // send response
});
ii) To get multiple data as array from database use below syntax or example
Syntax :
reg.find({},function(err,data){
//callback content
});
Example :
reg.find({key : value},function(err,data){
res.send(data); // send response
});
To Update data in MongoDB database collection i) Normal update
Syntax :
reg.update(QUERY_VALUE, UPDATE_VALUE).exec(function(err,value){
if(err){
console.log("Error block")
}else{
console.log("Success block")
}
});
Example :
reg.update({key:value}, {key1:value1,key2: value2}).exec(function(err,value){
if(err){
console.log("Error block")
}else{
console.log("Success block")
}
});
ii) Find and update By default, findOneAndUpdate returns the original document. If you want it to return the modified document pass an options object { new: true } to the function
Syntax :
reg.findOneAndUpdate({FIND_VALUE},{UPDATE_VALUE},{OPTIONAL},
function(err, content){
if(!err){
res.json({status: "success", data: value});
}else{
res.json({status:"error"});
}
});
Example :
reg.findOneAndUpdate({key: value},
{key1: value1, key2: value2}, {new: true}, function(err, doc){
if(err){
console.log("Error block");
}else{
console.log("Success block");
}
});
NOTE: if optional json contain {new:true} - it will return updated document details if optional json not contain or contain {new:false} - if will return old value
To delete a data collection from mongodb database:
i) Normal delete data from collection:
Syntax :
reg.remove(QUERY_VALUE);
Example :
reg.remove({key:value});
ii) Find and remove data from collection: Syntax :
reg.find({QUERY_VALUE}).remove().exec();
Example :
reg.find({key: value}).remove().exec();
iii) Drop collection from mongodb database: Syntax :
Collection_name.drop();
Example :
reg.drop();
MySQL is the most popular Open Source Relational SQL database management system. MySQL is one of the best RDBMS being used for developing web-based software applications.
Before we proceed to explain MySQL database system, let’s revise few definitions related to the database.
Database: A database is a collection of tables, with related data.
Table: A table is a matrix with data. A table in a database looks like a simple spreadsheet.
Column: One column contains data of one and the same kind, for example, the column postcode.
Row: A row is a group of related data, for example the data of one subscription.
Primary Key: A primary key is unique. A key value can not occur twice in one table. With a key, you can find at most one row.
Foreign Key: A foreign key is a linking pin between two tables.
[root@host]# rpm -i MySQL-client-5.0.9-0.i386.rpm
[root@host]# rpm -i MySQL-level-5.0.9-0.i386.rpm
[root@host]# rpm -i MySQL-shared-5.0.9-0.i386.rpm
[root@host]# rpm -i MySQL-bench-5.0.9-0.i386.rpm
Basic Queries are
Creating separate space in MySQL.
create database <DB_Name>;
To use the created Database
use <DB_Name>;
Creating table in Database
create table <TableName>(Column1 Datatype,Column2 Datatype,...);
Insert data in created table
insert into <TableName>
values('string_data',integer_data,....);
Select table
To retrieve data from table
select * from <TableName>; (or) select
<column_name> from <TableName>;
select * from <TableName> where
<column_name>='<user_data'>;
View table
Create view table form existing table.
create view <ViewTableName> as
select <Column1>, <Column1> from <OldTableName>;
Delete table
To delete data or table
delete table <TableName>;
delete table <TableName> where <ColumnName>="<userdata>"
Avg
The AVG function calculates the average value of a set of values. It ignores NULL values in the calculation.
select AVG(<ColumnName) from <TableName>;
Count
The COUNT function returns the number of the rows in a table.
select COUNT(*) from <TableName> (or) select
COUNT(<columnName>) from <TableName>;
Sum
The SUM function returns the sum of a set of values.
select SUM(<ColumnName>) from <TableName>;
Min
The MIN function returns the minimum value in a set of values.
select MIN(<ColumnName>) from <TableName>;
Max
The MAX function returns the maximum value in a set of values.
select MAX(<ColumnName>) from <TableName>;
Example:
nodejs with MySQL
var express = require("express");
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'localhost',
user : 'root',
password : '',
database : 'address_book'
});
var app = express();
connection.connect(function(err){
if(!err) {
console.log("Database is connected ... nn");
} else {
console.log("Error connecting database ... nn");
}
});
app.get("/",function(req,res){
var query="select * from register where urname='"+req.body.urname+"' and pw='"+req.body.pw+"'";
connection.query(query, function(err, rows, fields) {
connection.end();
if (!err)
console.log('The solution is: ', rows);
else
console.log('Error while performing Query.');
});
});
app.get("/",function(req,res){
connection.query('insert into user values('+1+','+sathiya+','+sathiya@gmail.com+','+sathiya2901+')', function(err, rows, fields) {
connection.end();
if (!err)
console.log('The solution is: ', rows);
else
console.log('Error while performing Query.');
});
});
app.listen(3000);
Grunt is a Task Runner which is used to automate the process in the java script. To run a grunt command type grunt task name in the cmd.
Syntax to Run a Task : grunt Taskname.
Example
//Tasks:
grunt.loadNpmTasks('grunt-bower-concat');
grunt.loadNpmTasks('grunt-bower-install');
grunt.registerTask('builddev',
['clean:dev','bower_concat:dev', 'concat:devlibcss', 'copy:dev', 'watch:dev']);
grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.loadNpmTasks('grunt-stripcomments');
grunt.loadNpmTasks('grunt-htmlclean');
The above example is the tasks for the grunt. This will automatically run the tasks when required.
Git is the most popular version control system as we all know all and used to track and share code between team members but here is our swiss army knife of git commands useful whenever you want them available handy
git config Sets configuration values for your user name, email, gpg key, preferred diff algorithm, file formats and more.
git init Initializes a git repository – creates the initial ‘.git’ directory in a new or in an existing project.
git clone Makes a Git repository copy from a remote source. Also adds the original location as a remote so you can fetch from it again and push it if you have permissions.
git add Adds files changes in your working directory to your index.
git rm Removes files from your index and your working directory so they will not be tracked.
git commit Takes all of the changes written in the index, creates a new commit object pointing to it and sets the branch to point to that new commit.
git merge Merges one or more branches into your current branch and automatically creates a new commit if there are no conflicts.
git reset Resets your index and working directory to the state of your last commit.
git stash Temporarily saves changes that you don’t want to commit immediately. You can apply the changes later.
git tag Tags a specific commit with a simple, human-readable handle that never moves.
git remote Shows all the remote versions of your repository.
git log Shows a listing of commits on a branch including the corresponding details.
git show Shows information about a git object.
git ls-tree Shows a tree object, including the mode and the name of each item and the SHA-1 value of the blob or the tree that it points to.
Nginx is a Web Server.The Nginx is an open source web server. It can act as a reverse proxy for the Http, Https, etc.Here we are mainly using it to configure the Local host.
Download and install Nginx from their official website http://nginx.org/en/download.html Extract the zip file into any drive using WinRAR. Locate the extracted folder, C:\nginx-1.8.0\nginx-1.8.0\conf (In here, the Nginx is installed into the C drive) Then open nginx.config file from the list using notepad. Include the location of the current working directory. This points the nginx server to acts as a Local host. Make other location as comments by adding # previously to the location path.
1)Modify your main nginx.conf file (nginx/conf/nginx.conf)
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
include C:/nginx/conf/sites-enabled/*.conf;
}
2)open directory path C:/nginx/conf/sites-enabled create file localhost.conf file
** localhost.conf **
server {
listen 80;
server_name localhost;
charset koi8-r;
access_log logs/localhost.access.log;
location / {
root C:\Users\aaa\Documents\clofus-enterprise; # Your Project Directory (absolute Path)
try_files $uri $uri/ /index.html =404;
}
}
3)To Run Multiple hosts, copy the above code and create file as example.conf and change your system host file
Download host File Editor https://hostsfileeditor.codeplex.com and open host file editor and add IP address pointing to 127.0.0.1 to your host name
Open etc/hosts and add IP address pointing to 127.0.0.1 to your host name
4)Finally Restart Nginx
root C:\Users\Dell\Desktop\AngularJs; (AngularJs is the folder for the nginx localhost).
Note : Include # before the C:\Users\Dell\Desktop\AngularJs; to make this line as a comment.
Include try_files $uri $uri/ /index.html =404; line below to the localhost path. This will try to find and open the index.html file inside the localhost path and if the file is not found it will display Error 404 file not Found.
Note : The default Ip address for the local host is 127.0.0.1.
If you wish to change your server name from the default (By default the server name is Localhost) Change your preferred name instead of localhost in server_name localhost; (Replace Localhost by your preferred name).
Download and install host file editor from https://hostsfileeditor.codeplex.com/ edit and change the default Ip address of the local host or any other Ip if you wish to.
1.Download nginx stable version. (link:http://nginx.org/en/download.html)
2.Move the zip Ng-inx folder to location *C:*
3.Unzip it
4.open conf folder and open nginx.conf file
5.change location / { root C:\Users\clofus\Documents\projects\clofus-dev- app\clofus-dev-app; index index.html index.htm; } under server
6.Enter localhost in the address bar of browser it shows the index page
To Configure nginx in Linux
1.Open command window in Linux
2.Enter path as “cd /etc/nginx/ sites-enabled/”
3.To Edit default file enter “gksudo gedit default” in command
4.Default file will open in edit window then add the current working directory under location
5.Then restart the nginx using command “sudo service nginx restart”, Now localhost will run as internal server
You can setup and run project successfully once you configured the nginx, then you can check the project by opening it on browsers
The Chrome Developer Tools (Devtools for short), are a set of web authoring and debugging tools built into Google Chrome. The Devtools provide web developers deep access into the internals of the browser and their web application. Use the Devtools to efficiently track down layout issues, set JavaScript breakpoints, and get insights for code optimization Overall, there are eight main groups of tools available view Developer Tools:
The elements consist of the HTML code corresponding to the document and it also has the CSS code on the right side which is very much helpful for the front-end designers to efficiently design the webpage.
The resources section consists of the local storage, Whenever the browser refreshes the data stored will be replaced with new data from the server. In order to use the data for further processing, they can be stored in the local storage as temporary files.
In Network section used to view the network calls between the server and the client. It displays every time when the network call initiated between the server and the client.
Source section used to view the Source files of the corresponding files. This section allows specifically set the breakpoints between the codes to run particular part and verify for errors.
The Profiles panel lets you profile the execution time and memory usage of a web app or page. The Profiles panel includes two profilers: a CPU profiler and a Heap Profiler. These help you to understand where resources are being spent, and so help you to optimize your code:
The console section consists of the error logs and it acts as an output screen to check the printed values of the variables.
That all! We hope you have learned many things about AngularJS, NodeJS and other technologies that cover in this article.
If you have any clarification and suggestions don’t hesitate to contact us via support@clofus.com
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