首发于 语雀@blueju

    https://leetcode-cn.com/problems/yong-liang-ge-zhan-shi-xian-dui-lie-lcof/submissions/

    1. var CQueue = function () {
    2.     this.inStack = []
    3.     this.outStack = []
    4. };
    6. /** 
    7.  * @param {number} value
    8.  * @return {void}
    9.  */
    10. CQueue.prototype.appendTail = function (value) {
    11.     this.inStack.push(value)
    12. };
    14. /**
    15.  * @return {number}
    16.  */
    17. CQueue.prototype.deleteHead = function () {
    18.     if (this.outStack.length === 0) {
    19.         if (this.inStack.length === 0) {
    20.             return -1
    21.         } else {
    22.             this.inStack.forEach(item => {
    23.                 this.outStack.unshift(item)
    24.             })
    25.             this.inStack = []
    26.             return this.outStack.pop()
    27.         }
    28.     } else {
    29.         return this.outStack.pop()
    30.     }
    31. };
    33. /**
    34.  * Your CQueue object will be instantiated and called as such:
    35.  * var obj = new CQueue()
    36.  * obj.appendTail(value)
    37.  * var param_2 = obj.deleteHead()
    38.  */