Javascript Json

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JSON, short for JavaScript Object Notation, is a way to store data. In JSON objects, values ‚Äã‚Äãare mapped to labels called keys. JSON objects can store any type of data, including strings, integers, and other JSON values.

JSON is a standard file format that allows you to store and share data. Programming languages ‚Äã‚Äãsuch as JavaScript, Python, PHP and all support the manipulation and reading of JSON data.

In this guide, we’ll explore how to use JavaScript JSON. We’ll explore the basics of JSON format and how a JSON object compares to a JavaScript object.

What is JSON?

JSON is a method of storing and sharing data. It is based on the syntax of the JavaScript object. The difference is that JSON is completely text-based, whereas objects are not. JSON stands for JavaScript Object Notation.

While JSON is based on the principles of the JavaScript programming language, it is used in many other languages ‚Äã‚Äãsuch as PHP, Java, and Ruby.

You can store JSON data as a file or as a value in a program. For example, a program might include a file called mtg_cards.json which stores a list of Magic Gathering Cards. We could store this data in a JavaScript variable called mtg_cards .

Here is the structure of a piece of stored data in JSON:

JSON stores data using a structure called key value pairs. Key-value pairs are data that use the following structure: "key": "value".

CARD_NAME is an example of a key. The values ‚Äã‚Äãare located on the right side of the colon. In JSON, you store key names as strings, but the values ‚Äã‚Äãcan be of any data type, such as boolean or integer.

JSON is often API for sending data. for example, suppose you are using the Airtable or Fitbit API. you will need to send data and read the data in the JSON data format.

How to access JavaScript JSON data

For access JSON data in JavaScript, you can use square brackets or dot notation . scoring hook is similar to the recovery of a value of a href = "/ javascript-array/">JavaScript table. instead of specifying an index position, specify the name of the one you want to retrieve. the value

Consider our object from earlier, now formatted as a JSON object:

In this example, we have assigned our JSON object to the black_lotus variable. Let’s say you want to know the type of card for Black Lotus. This is a prohibited card in the Magic the Gathering collectible card game .

brackets

Using the notation in brackets, we can discover the Black Lotus card type card.

To use this notation, we must specify the name of the object that we want to retrieve a value of. Then, we specify the name of the key associated with this value. The key name must be enclosed in quotes and square brackets.

The following code retrieves data on the Lotus Noir Card Type:

Our code returns: Mono artefact. We mentioned our key name twice, surrounded by square brackets, and then appended to the end of the black_lotus variable. This allows us to access data stored under the name of card_type.

Dot notation

Dot notation is where you access an object by specifying an object name, followed by a period. You then specify the name of the key whose value you want to access.

To access the Black Lotus card type using point notation, you can use this code:

Our feedback code: "Mono artefact".

We have specified the name of our object ("black_lotus"), followed by the key whose value we want to access ("card_type " ).

JSON conversion

Often times when working with an object you need to convert it to a JSON string or vice versa. This is a common practice if you want to send data through a web server.

JSON is easier to manipulate in technologies like JavaScript. It would be very difficult to extract all the values ‚Äã‚Äãfrom a single string.

At first , you want to convert an object like trying so that you can send it to a server. So you’ll want to convert it back to an object so that you can treat the data as an object.

To convert an object to a JSON string, you can use the JSON.stringify () function. Suppose we want to convert our Black Lotus object from the start to a string. We could do it using this code:

our code returns the following JSON text:

, our JSON data is a string. You can use the method to convert this string back a JSON object JSON.parse ():

This code returns:

As you can see, our data is now an object.

JSON vs JavaScript object

JSON notation was based on JavaScript objects.

Why JSON was designed to be taken supported in several programming languages, it is not quite the same as a JavaScript object. For example, JSON is supported in PHP and Python. Each programming language that supports JSON has its own unique implementation,

While keys in JavaScript objects are not stored in quotes, keys in JSON data must be stored in quotes.

If you look in a JSON file, all keys are attached If you look at a JavaScript object, you will see that the keys cannot be quoted.

Both JSON and JavaScript objects store data in a key value structure.

Conclusion

supports JavaScript to store data in JSON. JSON, short for JavaScript Object notation, is a way to store related data in an object. Each value of the object has its own label, also called the key.

You are now equipped to use JSON in JavaScript like a pro!

Want to learn more about JavaSc ript Check out our How to Learn JavaScript Guide. You will find the best tips on how to learn JavaScript and a list of learning resources for beginner and intermediate developers.

👻 Read also: what is the best laptop for engineering students?

We hope this article has helped you to resolve the problem. Apart from Javascript Json, check other array Python module-related topics.

Want to excel in Python? See our review of the best Python online courses 2023. If you are interested in Data Science, check also how to learn programming in R.

By the way, this material is also available in other languages:



Xu Krasiko

Tallinn | 2023-03-23

I was preparing for my coding interview, thanks for clarifying this - Javascript Json in Python is not the simplest one. Will use it in my bachelor thesis

Carlo Jackson

Singapore | 2023-03-23

I was preparing for my coding interview, thanks for clarifying this - Javascript Json in Python is not the simplest one. Will get back tomorrow with feedback

Cornwall Sikorski

Prague | 2023-03-23

Simply put and clear. Thank you for sharing. Javascript Json and other issues with Ev PHP module was always my weak point 😁. I am just not quite sure it is the best method

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