JavaScript 写的key-value数组-优快云博客

本文介绍了一种在JavaScript中实现键值对数组的方法，包括插入、查找、删除等基本操作，并提供了示例代码。

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// JavaScript Key-Value Array

// cheungmine

function _pair_array_t (keyCompFunc) {
  this._keys = new Array();
  this._vals = new Array();

  this._comp = function (k1, k2) {
    return (k1==k2);
  }
  this.npos = -1; // DONOT change this

  if (keyCompFunc != null)
    this._comp = keyCompFunc;

  this.insert = function (key, value) {
    for (var i=0; i<this._keys.length; i++) {
      if (this._comp(this._keys[i], key)) {
        this._vals[i] = value;
        return;
      }      
    }
    this._keys.push(key);
    this._vals.push(value);        
  }

  this.size = function () {
    return this._keys.length;
  }
  
  this.find = function (key) {
    for (var i=0; i<this._keys.length; i++) {
      if (this._comp(this._keys[i], key)) {
        return i;
      }
    }
    return this.npos;
  }

  this.getKey = function (i) {
    return this._keys[i];
  }

  this.getVal = function (i) {
    return this._vals[i];
  }
  
  this.erase = function (key) {
    var at = this.find(key);
    if (at != this.npos) {
      this._keys.splice(at, 1);
      this._vals.splice(at, 1);      
      return true;
    }
    return false;
  }

  this.clear = function () {
    this._keys.splice(0);
    this._vals.splice(0);
  }
}

使用：

var map = new _pair_array_t();
map.insert("zhang", "hello");
map.insert("liang", "world");
alert(map.size());
map.erase("zhang");
alert(map.size());
alert(map.find("zhang"));