Question

92

Convert object's properties and values to array of key value pairs

rated 0 times [ 97] [ 5] / answers: 1 / hits: 65140 / 12 Years ago, wed, january 30, 2013, 12:00:00

I'm fairly new to JavaScript and am not sure this is possible to do but basically I would like to take an object and convert it into an array of strings in the format; array[0] = 'prop1=value1'

The reasoning behind this is that I'm having a user enter a list of k=v pairs into a form, later it's written as an object within a json blob. Going from the key value csl to the json object was simple, now I need to go back the other way (I've received the JSON via an ajax call and want to populate a blank form). Is this possible in JavaScript? If not please offer a reasonable work around.

Sample code;

Object in debugger;

 Object

        private_key: private-key

        public_key: public-key

I need to convert that to;

 private_key=private-key,public_key=public-key

Basically I need something like this (pseudo code)

var outputString = '';

foreach (prop in obj)

{

    outputString = outputString + prop.tostring() + '=' + prop.value + ',';

}

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shawn

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answered 12 Years ago kristiano · Accepted Answer

You're probably looking for something along the lines of

var obj = {value1: 'prop1', value2: 'prop2', value3: 'prop3'};

var arr = [];

for (var key in obj) {

    if (obj.hasOwnProperty(key)) {

        arr.push(key + '=' + obj[key]);

    }

};

var result = arr.join(',');

alert(result);

Notice that it will work fine if your values are strings; if they're complex objects then you'll need to add more code.

Or you can just use jQuery.param, which does what you want, even for complex types (although it uses the & character as the separator, instead of the comma.