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This article mainly introduces what is the use of the json file, the article is very detailed, has a certain reference value, interested friends must read it!

Json file is a lightweight data exchange format that is easy for people to read and write. It is also easy to machine parse and generate. JSON uses a completely language-independent text format, but also uses habits similar to the C language family.

JSON (JavaScript Object Notation) is a lightweight data exchange format. Easy for people to read and write. At the same time, it is also easy to parse and generate by machine. It is based on a subset of JavaScript Programming Language, Standard ECMA-262 3rd Edition-December 1999.

JSON uses a completely language-independent text format, but also uses habits similar to those of the C language family (including C, Clipper, Java, JavaScript, Perl, Python, etc.). These features make JSON an ideal data exchange language.

JSON is constructed on two structures, one is the collection of name / value pairs (A collection of name/value pairs). In different languages, it is understood as object (object), record (record), structure (struct), dictionary (dictionary), hash table (hash table), key list (keyed list), or associative array (associative array).

The other is the ordered list of values (An ordered list of values). In most languages, it is understood as an array.

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Brief History of JSON

JSON (JavaScript Object Notation) is a lightweight data exchange format. Easy for people to read and write. At the same time, it is also easy to parse and generate by machine. It is based on a subset of JavaScript Programming Language, Standard ECMA-262 3rd Edition-December 1999.

JSON is a data format promoted by Douglas Crockford in 2001 and officially became the mainstream data format from 2005 to 2006. Yahoo and Google began to widely use JSON format at that time.

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