Original: JavaScript Loop queue class

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var leescirclequeue=function (size) {//queue array var _queue=[];             Team Head index VAR _front=0;           Team Tail index var _rear=0;    The number of elements Var _length=0;    The memory size of the queue, but the actual usable size is _capacity-1 var _capacity = size; add element this.        Push=function (item) {var nIndex = Getnextrearindex ();        _queue[nindex] = Item;    if (_length < _capacity) _length++; }//Remove head element this.            Pop=function () {if (_length > 0) {_length--;            _front++;        if (_front = = _capacity) _front = 0;        } if (_length = = 0) {_front = _rear = 0; }}//Get the full contents of this.        Getallitem=function () {var tmp = [];        for (var i = 0; i < _length; i++) {Tmp[i] = _queue[(_front + i)% _capacity];                    } return TMP; }//Gets the next index function Getnextrearindex () {if (_length = = _capacity)//full       {_rear = (_rear + 1)% _capacity;        _front = (_rear + 1)% _capacity;            } else {if (_length > 0) _rear = (_rear + 1)% _capacity;            else {_front = _rear = 0;    }} return _rear; }};

Original: JavaScript Loop queue class