JSON: Difference between revisions

Revision as of 08:05, 6 March 2005

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'''JSON''', which stands for "'''J'''ava'''s'''cript '''o'''bject '''n'''otation", is a lightweight data interchange format. '''JSON''' has the advantage, over [[XML]], as a data interchange format in that it can be trivially parsed, by Javascript, with Javascript's built in [[eval]]() procedure. (This is important because of [[Javascript]]'s ubiquitousness amoung [[web browsers]].) '''JSON''' is Javascript's [[object literal]] format.

'''JSON''', which stands for "[[JavaScript]] object notation", is a lightweight data interchange format.

== Using JSON and JavaScript ==

'''JSON''' is useful as a data-interchange format because it can be trivially parsed, by Javascript built in [[eval]]() procedure. For example:

Unlike many [[object-oriented programming language]]s, JavaScript objects do not necessarily have to be created by a [[constructor]]. JavaScript objects can be created by an [[object literal]] format. For example:

my_object =

{ "name" : "Joe Blow"

, "address" : "123 Somewhere Street"

, "city" : "Surrey"

, "province" : "BC"

, "country" : "Canada"

};

This produces a JavaScript object named "my_object" with ''fields'': "name", "address", "city", "province", and "country". One could use this object as follows:

document.write("My name is "+my_object.name+".\n");

document.write("And I live on "+my_object.address+" in "+my_object.city+".\n");

Which would print out:

My name is Joe Blow.

And I live on 123 Somewhere Street in Surrey.

'''JSON''' is a JavaScript object literal.

eval("the_object = " + json_data + ";");

== JSON Pronunciation ==