Read, Write and Parse JSON in JavaScript

The full form for JSON is JavaScript Object Notation and it is derived from the JavaScript programming language. A standard text format that defines the structured data is based on JavaScript object syntax. Transmission of data in web applications takes place through JSON. Have you heard about JavaScript object literal syntax? Yeah, JSON resembles it in a close manner. We are not limited to use it always with JavaScript.

JSON vs JavaScript. How to compare them?

There is no ambiguity that JSON looks like JavaScript but, the easiest way to think of JSON is,  as a data format, in resemblance with a text file. As JSON is inspired by JavaScript syntax, that’s the reason why they both look similar.

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JSON Parsing in Android - Step by Step Implementation

JSON Structures in Android

JSON uses two types of brackets that are as follows:

• [] – To declare the elements of Array in JSON, they’re written in square brackets.
• {} – To create JSON objects, the elements are written in curly brackets.

JSON has the following types of structures that are:

1. JSON Objects

The elements inside the curly brackets are known as Objects.

2. JSON Array

A list of values, known as Arrays.

3. JSON Key-Value

This data is stored as a pair of keys and values. Here the keys can be a name, a number for which the values can be Seema, 98767586 etc.

Why JSON Parsing in Android over XML?

Let us see some reasons for why to choose JSON over XML:

• It is much easier and quicker with high performance
• It can use arrays
• Its libraries do not depend on other libraries
• The codes written in JSON are short, clean and easy to understand
• It is free to open use and open-source tool
• In JSON value retrieval is easy
• It has a fully automated way of serializing/deserializing JavaScript.
• It is supported by many Ajax toolkits and most of the backend technologies.

Examples of XML and JSON

Let us see the code difference of JSON and XML files:

XML Example:

<?xml version= “1.0” encoding= “” ?>
<student>
        <student>
  <name> Sia Sharma</name>
  <city> Chandigarh</city>
         </student>
        <student>
  <name>Dimple D’souza</name>
  <city> Nagpur</city>
         </student>
      <student>
  <name>Anna Jones</name>
  <city> Mumbai</city>
         </student>
  </student>

JSON Example:

{ “students”: [
{ “name”: “Sia Sharma”, “city”: “Chandigarh”},
{ “name”: “Prachi D’Souza”, “city”: “Nagpur”},
{ “name”: “Annas Jones”, “city”: “Mumbai”}
]}

I hope the difference is all clear in front of you. This is how simple JSON is and how easily it could be understood.

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What is JSON? | JSON Objects and JSON Arrays | Working with JSONs Tutorial

In this video, we work with JSONs, which are a common data format for most web services (i.e. APIs). Thank you for watching and happy coding!

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Endpoint Example
http://maps.googleapis.com/maps/api/geocode/json?address=13+East+60th+Street+New+York,+NY

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Javascript parse json | How To Parse JSON in Javascript

Javascript json parse() is an inbuilt function that converts text into a Javascript object. The json parse() function is converting json string to object. The JSON.parse() is synchronous, so the more the JSON data is big, the more time your program execution will be blocked until the JSON is finished parsing. If you have JSON data as part of the  string, the best way to parse it is by using the JSON.parse() method.

The primary use of JSON is to exchange data between client and server. When we receive the data from a web server, the data is always a string, so we need to parse the data with JSON.parse(), and the data becomes a  JavaScript object.

#What is JSON(Javascript Object Notation)

JSON is derived from the JavaScript programming language, and it is the natural choice to use as the data format in JavaScript. For example when we create and consume API for mobile and other applications.

JSON stands for JavaScript Object Notation, which is usually pronounced like the name “Jason”.

If you want to begin thinking about where you may use the JSON in your JavaScript projects, some general use cases of JSON include:

1. Storing the data.
2. Generating data structures from user input.
3. Transferring the data from client to server, server to server, and server to a client.
4. Configuring and verifying the data.

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What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

• For single line comment in JavaScript we have to use // (double slashes)
• For multiple line comments we have to use / * – – * /

<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

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