Merge keys array and values array into an object in Javascript

Question

I have:

var keys = [ "height", "width" ];
var values = [ "12px", "24px" ];

And I'd like to convert it into this object:

{ height: "12px", width: "24px" }

In Python, there's the simple idiom dict(zip(keys,values)). Is there something similar in jQuery or plain Javascript, or do I have to do this the long way?

Answer 1

function combineObject( keys, values)
{
    var obj = {};
    if ( keys.length != values.length)
       return null;
    for (var index in keys)
        obj[keys[index]] = values[index];
     return obj;
};


var your_obj = combine( your_keys, your_values);

Answer 2

Simple JS function would be:

function toObject(names, values) {
    var result = {};
    for (var i = 0; i < names.length; i++)
         result[names[i]] = values[i];
    return result;
}

Of course you could also actually implement functions like zip, etc as JS supports higher order types which make these functional-language-isms easy :D

Answer 3

In the jQuery-Utils project, the ArrayUtils module has a zip function implemented.

//...
zip: function(object, object2, iterator) {
    var output = [];
    var iterator = iterator || dummy;
        $.each(object, function(idx, i){
        if (object2[idx]) { output.push([i, object2[idx]]); }
    });
    return output;
}
//...