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Question: Compare JSON with JavaScript.Answer: • JSON is a subset of the object literal notation of JavaScript> JSON can be used in the JavaScript language with no muss or fuss Example: JSON Object var myJSONObject = {"bindings": [ {"ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*"}, {"ircEvent": "PRIVMSG", "method": "deleteURI", "regex": "^delete.*"}, {"ircEvent": "PRIVMSG", "method": "randomURI", "regex": "^random.*"} ] }; • In this example, a JSON JavaScript object is created containing a single member "bindings", which contains an array containing three objects, each containing "ircEvent", "method", and "regex" members • Members can be retrieved using dot or subscript operators myJSONObject.bindings[0].method // "newURI" Text to Object Conversion in JavaScript code var myObject = eval('(' + myJSONtext + ')'); • To convert a JSON text into an JSON object, use the eval() function > eval() invokes the JavaScript compiler > Since JSON is a proper subset of JavaScript, the compiler will correctly parse the text and produce an object structure |
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