Concatenate javascript "strings" into objects

Question

I'm writing a method which should concatenate two strings(that are result of json stringify) into one string(which should look like json object with it's structure).

First one :

{"text":"klk","makeId":"9"}

Second one:

{"firstname":"jjk","lastname":"jkjk","email":"[email protected]"}

How do I concatenate these two into one json string i.e :

{"text":"klk","makeId":"9", "firstname":"jjk","lastname":"jkjk","email":"[email protected]"}

I could strip {" and "} then split by comma and achieve this result. I'm wondering is there better more smart way to do this?

Don't use string concatenation. Parse the JSON, consolidate the objects' content, and serialize the result. — I Hate Lazy
– I Hate Lazy, Commented Nov 28, 2012 at 17:14

Esailija · Accepted Answer · 2012-11-28 17:24:13Z

6

These strings are JSON! Parse them, merge them like objects and stringify them again.

var data1 = JSON.parse(json1);
var data2 = JSON.parse(json2);
var data = merge(data1, data2); // implement merge!
console.log(JSON.stringify(data));

JSON should be available in all recent browsers.

function merge(obj1, obj2) {
    var hasOwn = {}.hasOwnProperty;
    for (var key in obj2) {
        if (hasOwn.call(obj2, key)) {
            obj1[key] = obj2[key];
        }
    }
    return obj1;
}

edited Nov 28, 2012 at 17:24

Esailija

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answered Nov 28, 2012 at 17:14

Halcyon

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3 Comments

SAJ14SAJ Over a year ago

I agree, but I cannot give you a +1 because "implement merge" is a pretty big step if the OP is not a JavaScript expert.

Cubic Over a year ago

@SAJ14SAJ Not really. I'm by no means a JavaScript expert (with that I mean, I've written Hello World and that's basically it) and I could do it in less than 5 minutes.

SAJ14SAJ Over a year ago

@Cubic If you know about hasOwnProperty, and finding an guaranteed unmodified version of it, then you are definitely closer to expert than novice :-)

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