'use strict';

if (!String.prototype.codePointAt) {

String.prototype.codePointAt = function(index) {

if (index >= this.length)

return NaN;

var code = this.charCodeAt(index);

if (0xD800 <= code && code <= 0xDBFF) {

var surr = this.charCodeAt(index + 1);

if (!isNaN(surr) && 0xDC00 <= surr && surr <= 0xDFFF)

code = 0x10000 + ((code - 0xD800) << 10) + (surr - 0xDC00);

}

return code;

};

}

if (!String.prototype.trim) {

String.prototype.trim = function() {

return this.replace(/^\s+|\s+$/g, '');

};

}

if (!Array.prototype.fill) {

Object.defineProperty(Array.prototype, 'fill', {

value: function(value) {

// Steps 1-2.

if (this == null)

throw new TypeError('this is null or not defined');

var O = Object(this);

// Steps 3-5.

var len = O.length >>> 0;

// Steps 6-7.

var start = arguments[1];

var relativeStart = start >> 0;

// Step 8.

var k = relativeStart < 0 ?

Math.max(len + relativeStart, 0) :

Math.min(relativeStart, len);

// Steps 9-10.

var end = arguments[2];

var relativeEnd = end === undefined ?

len : end >> 0;

// Step 11.

var final = relativeEnd < 0 ?

Math.max(len + relativeEnd, 0) :

Math.min(relativeEnd, len);

// Step 12.

while (k < final) {

O[k] = value;

k++;

}

// Step 13.

return O;

}

});

}