AS3 Tiled loading (Base64 zlib)

        private function decompressToVec( data:String ):Vector.<uint>
        {
            // Raw ByteArray from data. Used to decode.
            var ba:ByteArray = Base64.decodeToByteArray( data ); // decoding
            ba.uncompress(); // decompressing
            ba = reverseBA( ba ); // reversing.

            return baToVector( ba ).reverse(); // to vector and reversing again.
        }

        private function baToVector( ba:ByteArray ):Vector.<uint>
        {
            var endVec:Vector.<uint> = new Vector.<uint>( ba.length / 4 );
            ba.position = 0;
            for ( var i:int = 0; i < ba.length / 4; i++ )
            {
                endVec[ i ] = ba.readUnsignedInt();
            }
            return endVec;
        }

        private function reverseBA( ba:ByteArray ):ByteArray
        {
            var endBA:ByteArray = new ByteArray();
            ba.position = ba.length;
            for ( var i:int = 0; i < ba.length; i++ )
            {
                ba.position--;
                endBA.writeByte( ba.readByte() );
                ba.position--;
            }
            return endBA;
        }