mirror of
https://github.com/adambard/learnxinyminutes-docs.git
synced 2024-12-20 05:41:32 +03:00
86 lines
2.8 KiB
Markdown
86 lines
2.8 KiB
Markdown
---
|
|
language: json
|
|
filename: learnjson.json
|
|
contributors:
|
|
- ["Anna Harren", "https://github.com/iirelu"]
|
|
- ["Marco Scannadinari", "https://github.com/marcoms"]
|
|
- ["himanshu", "https://github.com/himanshu81494"]
|
|
- ["Michael Neth", "https://github.com/infernocloud"]
|
|
---
|
|
|
|
As JSON is an extremely simple data-interchange format, this is most likely going to be the simplest Learn X in Y Minutes ever.
|
|
|
|
JSON in its purest form has no actual comments, but most parsers will accept C-style (`//`, `/* */`) comments. Some parsers also tolerate a trailing comma (i.e. a comma after the last element of an array or the after the last property of an object), but they should be avoided for better compatibility.
|
|
|
|
For the purposes of this, however, everything is going to be 100% valid JSON. Luckily, it kind of speaks for itself.
|
|
|
|
A JSON value must be a number, a string, an array, an object, or one of the following 3 literal names: true, false, null.
|
|
|
|
Supporting browsers are: Firefox 3.5+, Internet Explorer 8.0+, Chrome 1.0+, Opera 10.0+, and Safari 4.0+.
|
|
|
|
File extension for JSON files is ".json" and the MIME type for JSON text is "application/json".
|
|
|
|
Many programming languages have support for serializing (encoding) and unserializing (decoding) JSON data into native data structures. Javascript has implicit support for manipulating JSON text as data.
|
|
|
|
More information can be found at http://www.json.org/
|
|
|
|
JSON is built on two structures:
|
|
* A collection of name/value pairs. In various languages, this is realized as an object, record, struct, dictionary, hash table, keyed list, or associative array.
|
|
* An ordered list of values. In most languages, this is realized as an array, vector, list, or sequence.
|
|
|
|
An object with various name/value pairs.
|
|
|
|
```json
|
|
{
|
|
"key": "value",
|
|
|
|
"keys": "must always be enclosed in double quotes",
|
|
"numbers": 0,
|
|
"strings": "Hellø, wørld. All unicode is allowed, along with \"escaping\".",
|
|
"has bools?": true,
|
|
"nothingness": null,
|
|
|
|
"big number": 1.2e+100,
|
|
|
|
"objects": {
|
|
"comment": "Most of your structure will come from objects.",
|
|
|
|
"array": [0, 1, 2, 3, "Arrays can have anything in them.", 5],
|
|
|
|
"another object": {
|
|
"comment": "These things can be nested, very useful."
|
|
}
|
|
},
|
|
|
|
"silliness": [
|
|
{
|
|
"sources of potassium": ["bananas"]
|
|
},
|
|
[
|
|
[1, 0, 0, 0],
|
|
[0, 1, 0, 0],
|
|
[0, 0, 1, "neo"],
|
|
[0, 0, 0, 1]
|
|
]
|
|
],
|
|
|
|
"alternative style": {
|
|
"comment": "check this out!"
|
|
, "comma position": "doesn't matter - as long as it's before the next key, then it's valid"
|
|
, "another comment": "how nice"
|
|
}
|
|
}
|
|
```
|
|
|
|
A single array of values by itself is also valid JSON.
|
|
|
|
```json
|
|
[1, 2, 3, "text", true]
|
|
```
|
|
|
|
Objects can be a part of the array as well.
|
|
|
|
```json
|
|
[{"name": "Bob", "age": 25}, {"name": "Jane", "age": 29}, {"name": "Jack", "age": 31}]
|
|
```
|