// ES5 Polyfills

// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map

if (!Array.prototype.map) {

Array.prototype.map = function(callback, thisArg) {

var O = Object(this);

var len = O.length >>> 0;

var T;

if (arguments.length > 1) {

T = thisArg;

}

var A = new Array(len);

var k = 0;

while (k < len) {

var kValue, mappedValue;

if (k in O) {

kValue = O[k];

mappedValue = callback.call(T, kValue, k, O);

A[k] = mappedValue;

}

k++;

}

return A;

};

}

// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

if (!Array.prototype.filter) {

Array.prototype.filter = function(callback/*, thisArg*/) {

var t = Object(this);

var len = t.length >>> 0;

var res = [];

var thisArg = arguments.length >= 2 ? arguments[1] : void 0;

for (var i = 0; i < len; i++) {

if (i in t) {

var val = t[i];

if (callback.call(thisArg, val, i, t)) {

res.push(val);

}

}

}

return res;

};

}