javaScript数据结构 04 链表

版权声明：三和小钢炮 https://blog.csdn.net/fwx426328/article/details/82315725

链表

链表存储有序的元素集合。

01 就写一个单向链表吧

;(function (window) {
  function Node(data) {
    this.data = data;
    this.next = null;
  }

  function Linklist() {
    this.length = 0;
    this.head = null;
  }
  Linklist.prototype.add = function (data) {
    var node = new Node(data);
    if (this.length == 0) {
      this.head = node;
    } else {
      var tempHead = this.head;
      this.head = node;
      this.head.next = tempHead;
    }
    this.length++;
  }
  Linklist.prototype.insert = function (index, data) {
    if (index <
      0 || index > this.length) {
      return false;
    }
    if (index == 0) {
      this.add(data);
      return;
    }
    var node = new Node(data);
    var currentNode = this.head;
    for (var nodeIndex = 1; currentNode; currentNode = currentNode.next, nodeIndex++) {
      if (index == nodeIndex) {
        var currentNext = currentNode.next;
        currentNode.next = node;
        node.next = currentNext;
      }
    }
    this.length++;
  }
  Linklist.prototype.pop = function () {
    var currentNode = this.head;
    this.head = currentNode.next;
    this.length--;
  }
  Linklist.prototype.remove = function (index) {
    if (index <
      0 || index >= this.length) {
      return false;
    }
    if (index == 0) {
      this.pop();
      return;
    }
    var currentNode = this.head;
    for (var nodeIndex =
        1; currentNode; currentNode = currentNode.next, nodeIndex++) {
      if (index == nodeIndex) {
        var afterNext = currentNode.next.next;
        currentNode.next = afterNext;
      }
    }
    this.length--;
  }
  Linklist.prototype.get = function (index) {
    var rtnStr = new String();
    if (index <
      0 || index >= this.length) {
      return false;
    }
    var currentNode = this.head;
    for (var nodeIndex = 0; currentNode; currentNode = currentNode.next, nodeIndex++) {
      if (index == nodeIndex) {
        return currentNode.data;
      }
    }
  }
  Linklist.prototype.addAll = function (list) {
    var currentNode = this.head;
    for (var nodeIndex = 0; currentNode; currentNode = currentNode.next, nodeIndex++) {
      if (!currentNode.next) {
        currentNode.next = list.head;
        this.length += list.length;
        return;
      }
    }
  }
  Linklist.prototype.toArray = function () {
    var rtnList = new Array();
    var currentNode = this.head;
    rtnList.push(currentNode.data);
    for (; currentNode.next; currentNode = currentNode.next) {
      rtnList.push(currentNode.next.data);
    }
    return rtnList;
  }
  Linklist.prototype.toString = function () {
    var arrayList = this.toArray();
    return arrayList.toString();
  }
  window.Linklist = Linklist;
})(window);