JS使用數(shù)組實(shí)現(xiàn)的隊(duì)列功能示例

/*一個(gè)用數(shù)組實(shí)現(xiàn)的隊(duì)列*/
function Queue(){
 this.dataStore = [];//存放隊(duì)列的數(shù)組，初始化為空
 this.enqueue = enqueue;//向隊(duì)列尾部添加一個(gè)元素
 this.dequeue = dequeue;//刪除隊(duì)首的元素
 this.theFront = theFront;//讀取隊(duì)首的元素
 this.back = back;//對(duì)取隊(duì)尾的元素
 this.toStrings = toStrings;//顯示隊(duì)列內(nèi)的所有元素
 this.empty = empty;//判斷隊(duì)列是否為空
}
function enqueue(element){
 this.dataStore.push(element);
}
function dequeue(){
 this.dataStore.shift();
}
function theFront(){
 return this.dataStore[0];
}
function back(){
 return this.dataStore[this.dataStore.length-1];
}
function toStrings(){
 return this.dataStore;
}
function empty(){
 if(this.dataStore.length == 0){
 return true;
 }else{
 return false;
 }
}
/*測(cè)試程序*/
var q = new Queue();
q.enqueue("aa");
q.enqueue("bb");
q.enqueue("cc");
console.log(q.toStrings());//[ 'aa', 'bb', 'cc' ]
q.dequeue();
console.log(q.toStrings());//[ 'bb', 'cc' ]
console.log(q.theFront());//bb
console.log(q.back());//cc