28 December, 2020

Vue.js Tutorial

Programing Coderfunda December 28, 2020 Vue.js Tutorial No comments

Vue.js Installation

Compatibility Check

Before going to install and use Vue.js in your project, you should check the compatibility issues. Vue does not support IE8 and below versions of IE, because it uses ECMAScript 5 features not supported in IE8. It supports all the ECMAScript 5 compliant browsers.

How to install Vue.js?

There are several methods to use Vue.js. You can install it by going to its official site or can start using the Vue.js file from the CDN library also. Here, we are going to discuss some ways on how to install and use Vue.js in your project.

By using the <script> tag directly in HTML file

If you want to use the <script> tag of Vue.js directly in your HTML file then you have to download it from the official website.

<html>  
   <head>  
      <script type = "text/javascript" src = "vue.min.js"></script>  
   </head>  
   <body></body>  
</html>  

Let's go ahead to the official website of Vue.js https://vuejs.org/v2/guide/installation.html and download the vue.js according to your requirement. Here, you will get two versions of Vue.js to use- development version and production version.

The following image shows both versions:

The development version is best to use in your project because it is not minimized, and helps you with the warnings and debug mode during the development of the project. On the other hand, the production version is minimized, as shown in the above screenshot.

Vue.js recommends that you not use the minified version during development because it doesn't show the warnings for common mistakes during the development of the project.

By Using CDN

You can also use the Vue.js file from the CDN library in your application. Use this link https://unpkg.com/vue within <script> element in your application, and you will get the latest version of Vue.js.

Example 1:

<!DOCTYPE html>  
<html>  
<head>  
  <title>My first Vue app</title>  
  <script src="https://unpkg.com/vue"></script>  
</head>  
<body>  
  <div id="app">  
    {{ message }}  
  </div>  
  <script>  
    var app = new Vue({  
      el: '#app',  
      data: {  
        message: 'Vue.js example with CDN'  
      }  
    })  
  </script>  
</body>  
</html>  

Output:

Vue.js example with CDN

You can also get Vue.js on jsDelivr (https://cdn.jsdelivr.net/npm/vue/dist/vue.js) and cdnjs (https://cdnjs.cloudflare.com/ajax/libs/vue/2.4.0/vue.js).

Example 2:

<!DOCTYPE html>  
<html>  
<head>  
  <title>My first Vue app</title>  
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>    
</head>  
<body>  
  <div id="app">  
    {{ message }}  
  </div>  
  <script>  
    var app = new Vue({  
      el: '#app',  
      data: {  
        message: 'Vue.js second example with CDN'  
      }  
    })  
  </script>  
</body>  
</html>  

Output:

Vue.js second example with CDN

By Using NPM

NPM is recommended to use if you want to make a large scale application with VueJS. Use the following command to install the Vue.js using the npm package. It comes with Browserify and Webpack, along with other necessary tools that make development easy.

npm install vue

Note: Don't use this method if you are not yet familiar with Node.js-based build tools.

By Using CLI Command Line

You can also install Vue.js by using CLI and get started with the server activation. Use the following command to install Vue.js using CLI:

npm install --global vue-cli

It will take a few minutes to install Vue.js cli. Once it is done, it will show the CLI version for Vue.js.

+ vue-cli@2.9.6
added 238 packages from 205 contributors in 346.282s
Create a project using Webpack
Use the following command to create a project using Webpack. Here, we are going to create a project named "my_project".
1. vue init webpack my_project
During this process, you will be asked to type Y/n. type Y and proceed further. It will automatically download the template and all dependencies.

After creating your project successfully, you will see a message like the following screenshot.

Start the project and Server

Now, the project is created. Go to the project directory by using the following command:

cd my_project

Use the following command to start the Server:

npm run dev

You can see that after running the npm run dev command, the Server is started. Now, open the compatible browser i.e., Google Chrome, and run the localhost http://localhost:8080/#/ to open your project.

Vue.js Tutorial

Programing Coderfunda December 28, 2020 Vue.js Tutorial No comments

Vue.js Installation

Compatibility Check

How to install Vue.js?

By using the <script> tag directly in HTML file

If you want to use the <script> tag of Vue.js directly in your HTML file then you have to download it from the official website.

<html>  
   <head>  
      <script type = "text/javascript" src = "vue.min.js"></script>  
   </head>  
   <body></body>  
</html>  

The following image shows both versions:

Vue.js recommends that you not use the minified version during development because it doesn't show the warnings for common mistakes during the development of the project.

By Using CDN

Example 1:

<!DOCTYPE html>  
<html>  
<head>  
  <title>My first Vue app</title>  
  <script src="https://unpkg.com/vue"></script>  
</head>  
<body>  
  <div id="app">  
    {{ message }}  
  </div>  
  <script>  
    var app = new Vue({  
      el: '#app',  
      data: {  
        message: 'Vue.js example with CDN'  
      }  
    })  
  </script>  
</body>  
</html>  

Output:

Vue.js example with CDN

You can also get Vue.js on jsDelivr (https://cdn.jsdelivr.net/npm/vue/dist/vue.js) and cdnjs (https://cdnjs.cloudflare.com/ajax/libs/vue/2.4.0/vue.js).

Example 2:

<!DOCTYPE html>  
<html>  
<head>  
  <title>My first Vue app</title>  
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>    
</head>  
<body>  
  <div id="app">  
    {{ message }}  
  </div>  
  <script>  
    var app = new Vue({  
      el: '#app',  
      data: {  
        message: 'Vue.js second example with CDN'  
      }  
    })  
  </script>  
</body>  
</html>  

Output:

Vue.js second example with CDN

By Using NPM

npm install vue

Note: Don't use this method if you are not yet familiar with Node.js-based build tools.

By Using CLI Command Line

You can also install Vue.js by using CLI and get started with the server activation. Use the following command to install Vue.js using CLI:

npm install --global vue-cli

It will take a few minutes to install Vue.js cli. Once it is done, it will show the CLI version for Vue.js.

+ vue-cli@2.9.6
added 238 packages from 205 contributors in 346.282s
Create a project using Webpack
Use the following command to create a project using Webpack. Here, we are going to create a project named "my_project".
1. vue init webpack my_project
During this process, you will be asked to type Y/n. type Y and proceed further. It will automatically download the template and all dependencies.

After creating your project successfully, you will see a message like the following screenshot.

Start the project and Server

Now, the project is created. Go to the project directory by using the following command:

cd my_project

Use the following command to start the Server:

npm run dev

SQL Operators

Programing Coderfunda December 26, 2020 SQL Tutorial No comments

SQL Arithmetic Operators

Operator	Description	Example
+	Add	Try it
-	Subtract	Try it
*	Multiply	Try it
/	Divide	Try it
%	Modulo	Try it

SQL Bitwise Operators

Operator	Description
&	Bitwise AND
\|	Bitwise OR
^	Bitwise exclusive OR

SQL Comparison Operators

Operator	Description	Example
=	Equal to	Try it
>	Greater than	Try it
<	Less than	Try it
>=	Greater than or equal to	Try it
<=	Less than or equal to	Try it
<>	Not equal to	Try it

SQL Compound Operators

Operator	Description
+=	Add equals
-=	Subtract equals
*=	Multiply equals
/=	Divide equals
%=	Modulo equals
&=	Bitwise AND equals
^-=	Bitwise exclusive equals
\|*=	Bitwise OR equals

SQL Logical Operators

Operator	Description	Example
ALL	TRUE if all of the subquery values meet the condition	Try it
AND	TRUE if all the conditions separated by AND is TRUE	Try it
ANY	TRUE if any of the subquery values meet the condition	Try it
BETWEEN	TRUE if the operand is within the range of comparisons	Try it
EXISTS	TRUE if the subquery returns one or more records	Try it
IN	TRUE if the operand is equal to one of a list of expressions	Try it
LIKE	TRUE if the operand matches a pattern	Try it
NOT	Displays a record if the condition(s) is NOT TRUE	Try it
OR	TRUE if any of the conditions separated by OR is TRUE	Try it
SOME	TRUE if any of the subquery values meet the condition	Try it

28 December, 2020

Vue.js Tutorial

Compatibility Check

How to install Vue.js?

By using the <script> tag directly in HTML file

By Using CDN

By Using NPM

Note: Don't use this method if you are not yet familiar with Node.js-based build tools.

By Using CLI Command Line

Create a project using Webpack

Start the project and Server

Vue.js Tutorial

Compatibility Check

How to install Vue.js?

By using the <script> tag directly in HTML file

By Using CDN

By Using NPM

Note: Don't use this method if you are not yet familiar with Node.js-based build tools.

By Using CLI Command Line

Create a project using Webpack

Start the project and Server

26 December, 2020

SQL Operators

SQL Bitwise Operators

SQL Comparison Operators

SQL Compound Operators

SQL Logical Operators

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