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diff --git a/json.html.markdown b/json.html.markdown index 47a8cb21..a612cffe 100644 --- a/json.html.markdown +++ b/json.html.markdown @@ -4,19 +4,33 @@ 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 is an extremely simple data-interchange format. As [json.org](http://json.org) says, it is easy for humans to read and write and for machines to parse and generate. -JSON in its purest form has no actual comments, but most parsers will accept -C-style (`//`, `/* */`) comments. For the purposes of this, however, everything is -going to be 100% valid JSON. Luckily, it kind of speaks for itself. +A piece of JSON must represent either: +* 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 various languages, this is realized as an array, vector, list, or sequence. + an array/list/sequence (`[ ]`) or a dictionary/object/associated array (`{ }`). + +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 tutorial, everything is going to be 100% valid JSON. Luckily, it kind of speaks for itself. + +Supported data types: + +* Strings: `"hello"`, `"\"A quote.\""`, `"\u0abe"`, `"Newline.\n"` +* Numbers: `23`, `0.11`, `12e10`, `3.141e-10`, `1.23e+4` +* Objects: `{ "key": "value" }` +* Arrays: `["Values"]` +* Miscellaneous: `true`, `false`, `null` ```json { "key": "value", - + "keys": "must always be enclosed in double quotes", "numbers": 0, "strings": "Hellø, wørld. All unicode is allowed, along with \"escaping\".", @@ -46,13 +60,23 @@ going to be 100% valid JSON. Luckily, it kind of speaks for itself. [0, 0, 0, 1] ] ], - + "alternative style": { "comment": "check this out!" - , "comma position": "doesn't matter - as long as it's before the value, then it's valid" + , "comma position": "doesn't matter, if it's before the next key, it's valid" , "another comment": "how nice" }, - "that was short": "And, you're done. You now know everything JSON has to offer." + + + "whitespace": "Does not matter.", + + + + "that was short": "And done. You now know everything JSON has to offer." } ``` + +## Further Reading + +* [JSON.org](http://json.org) All of JSON beautifully explained using flowchart-like graphics. |