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up vote 0 down vote favorite

Let say I have JSON object below:

var name = [
{
    "first": "juan",
    "last": "delaCruz"
},
{
    "first": "james",
    "last": "bond"
}

]

Can we use JSON.stringify to have the output:

juan, james
share|improve this question
    
JSON.stringify can't produce the string juan, james, since that isn't legal JSON. – Ted Hopp Sep 24 '13 at 4:00
1  
Note: That 1st snippet isn't JSON. It's a JavaScript literal. Similar syntaxes; different uses (code or data). – Jonathan Lonowski Sep 24 '13 at 4:00
    
Write a replacer function and mix the two together – Hanky Panky Sep 24 '13 at 4:01
up vote 1 down vote

You might be looking for pluck, like in underscore. A basic implementation looks like this:

function pluck(collection, key) {
    return collection.map(function(el) {
        return el[key];
    });
}


var name = [{
    first: 'juan',
    last:'dela Cruz'
}, {
    first: 'james',
    last:'bond'
    }
];

var fullname = pluck(name, 'first');
share|improve this answer
up vote 1 down vote

Since the expected output doesn't appear to be valid JSON, you won't be able to get it with just JSON.stringify().

But, you could combine .map() and .join() to accomplish it:

var firsts = name.map(function (entry) {
    return entry.first;
});

console.log(firsts.join(', ')); // juan, james

.map() is new with ECMAScript 5, so it'll be readily available in IE 9+ and other modern browsers. And, MDN includes a good polyfill to add it in older browsers.

share|improve this answer

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