Javascript equivalent of Python's zip function

Question

Is there a javascript equivalent of Python\'s zip function? That is, given multiple arrays of equal lengths create an array of pairs.

For instance, if I have three

Answer 1

Like @Brandon, I recommend Underscore's zip function. However, it acts like zip_longest, appending undefined values as needed to return something the length of the longest input.

I used the mixin method to extend underscore with a zipShortest, which acts like Python's zip, based off of the library's own source for zip.

You can add the following to your common JS code and then call it as if it were part of underscore: _.zipShortest([1,2,3], ['a']) returns [[1, 'a']], for example.

// Underscore library addition - zip like python does, dominated by the shortest list
//  The default injects undefineds to match the length of the longest list.
_.mixin({
    zipShortest : function() {
        var args = Array.Prototype.slice.call(arguments);
        var length = _.min(_.pluck(args, 'length')); // changed max to min
        var results = new Array(length);
        for (var i = 0; i < length; i++) {
            results[i] = _.pluck(args, "" + i);
        }
        return results;
}});