legacy.js

/*jshint
   asi: true,
   unused: true,
   boss: true,
   loopfunc: true,
   eqnull: true
 */


/*!
 * Legacy browser support
 */


// Map array support
if ( ![].map ) {
    Array.prototype.map = function ( callback, self ) {
        var array = this, len = array.length, newArray = new Array( len )
        for ( var i = 0; i < len; i++ ) {
            if ( i in array ) {
                newArray[ i ] = callback.call( self, array[ i ], i, array )
            }
        }
        return newArray
    }
}


// Filter array support
if ( ![].filter ) {
    Array.prototype.filter = function( callback ) {
        if ( this == null ) throw new TypeError()
        var t = Object( this ), len = t.length >>> 0
        if ( typeof callback != 'function' ) throw new TypeError()
        var newArray = [], thisp = arguments[ 1 ]
        for ( var i = 0; i < len; i++ ) {
          if ( i in t ) {
            var val = t[ i ]
            if ( callback.call( thisp, val, i, t ) ) newArray.push( val )
          }
        }
        return newArray
    }
}


// Index of array support
if ( ![].indexOf ) {
    Array.prototype.indexOf = function( searchElement ) {
        if ( this == null ) throw new TypeError()
        var t = Object( this ), len = t.length >>> 0
        if ( len === 0 ) return -1
        var n = 0
        if ( arguments.length > 1 ) {
            n = Number( arguments[ 1 ] )
            if ( n != n ) {
                n = 0
            }
            else if ( n !== 0 && n != Infinity && n != -Infinity ) {
                n = ( n > 0 || -1 ) * Math.floor( Math.abs( n ) )
            }
        }
        if ( n >= len ) return -1
        var k = n >= 0 ? n : Math.max( len - Math.abs( n ), 0 )
        for ( ; k < len; k++ ) {
            if ( k in t && t[ k ] === searchElement ) return k
        }
        return -1
    }
}


/*!
 * Cross-Browser Split 1.1.1
 * Copyright 2007-2012 Steven Levithan <stevenlevithan.com>
 * Available under the MIT License
 * http://blog.stevenlevithan.com/archives/cross-browser-split
 */
var nativeSplit = String.prototype.split, compliantExecNpcg = /()??/.exec('')[1] === undefined
String.prototype.split = function(separator, limit) {
    var str = this
    if (Object.prototype.toString.call(separator) !== '[object RegExp]') {
        return nativeSplit.call(str, separator, limit)
    }
    var output = [],
        flags = (separator.ignoreCase ? 'i' : '') +
                (separator.multiline  ? 'm' : '') +
                (separator.extended   ? 'x' : '') +
                (separator.sticky     ? 'y' : ''),
        lastLastIndex = 0,
        separator2, match, lastIndex, lastLength
    separator = new RegExp(separator.source, flags + 'g')
    str += ''
    if (!compliantExecNpcg) {
        separator2 = new RegExp('^' + separator.source + '$(?!\\s)', flags)
    }
    limit = limit === undefined ? -1 >>> 0 : limit >>> 0
    while (match = separator.exec(str)) {
        lastIndex = match.index + match[0].length
        if (lastIndex > lastLastIndex) {
            output.push(str.slice(lastLastIndex, match.index))
            if (!compliantExecNpcg && match.length > 1) {
                match[0].replace(separator2, function () {
                    for (var i = 1; i < arguments.length - 2; i++) {
                        if (arguments[i] === undefined) {
                            match[i] = undefined
                        }
                    }
                })
            }
            if (match.length > 1 && match.index < str.length) {
                Array.prototype.push.apply(output, match.slice(1))
            }
            lastLength = match[0].length
            lastLastIndex = lastIndex
            if (output.length >= limit) {
                break
            }
        }
        if (separator.lastIndex === match.index) {
            separator.lastIndex++
        }
    }
    if (lastLastIndex === str.length) {
        if (lastLength || !separator.test('')) {
            output.push('')
        }
    } else {
        output.push(str.slice(lastLastIndex))
    }
    return output.length > limit ? output.slice(0, limit) : output
};