zip for javscript

gistfile1.js

// Examples inspired by http://learnyouahaskell.com/syntax-in-functions

var fibobj = {
    0: function(){return 1},
    1: function(){return 1},
    undefined: function(n){return fibs(n-1) + fibs(n-2)}
}


var fibs = (function(o){
    return function() {
        var args = [].slice.call(arguments);
        var arg = args[0];
        return (o[arg] instanceof Function) ? o[arg](args) : o[undefined](args);
    }
})(fibobj);

var charNameObj = {
    'a': function(){return "Albert"},
    'b': function(){return "Broseph"},
    'c': function(){return "Cecil"},
    undefined: function(){throw("Non-exhaustive patterns in function charName")}
}

var charName = (function(o){
    return function(arg) {
        var args = [].slice.call(arguments);
        if( args.length != 1) throw("Illegal number of arguments");
        if( typeof arg != 'string') throw("Illegal type");
        return (o[arg] instanceof Function) ? o[arg](arg) : o[undefined](arg);
    }
})(charNameObj);

gistfile2.js

function zip() { 
    var args = [].slice.call(arguments);
    var shortest = args.length == 0 ? [] : args.reduce(function(a,b) {
        return a.length < b.length ? a : b;
    });
    
    return shortest.map( function(_,i) {
        return args.map(function(array) {
            return array[i]
        })
    });
}