使用Javascript - 重建索引数组

问题描述：

这里是我的榜样。你能告诉我怎样才能使数组已经连续键

Here is my example. Can you tell me how can I make the array have consecutive keys

array[0]
array[1]
array[2]

当我有

var testArray = new Array();
testArray[3]="qwerty";
testArray[7]="asdfgh";
testArray[13]="zxcvbn";
var testString = testArray.join();

编者按：提问者要他重新索引数组的

Editor's note: The asker wants to reindex his array.

答

如果你不介意使用JavaScript 1.6（注：此code使用jQuery库）

If you don't mind using javascript 1.6: (note: this code uses the jQUery library)

var testArray = new Array();
testArray[3]="qwerty";
testArray[7]="asdfgh";
testArray[13]="zxcvbn";
var testString = testArray.filter(function (item) { return item != undefined }).join();

$(function(){
    $('#write').text(testString);
});

过滤器的原型：

if (!Array.prototype.filter)
{
  Array.prototype.filter = function(fun /*, thisp */)
  {
    "use strict";

    if (this === void 0 || this === null)
      throw new TypeError();

    var t = Object(this);
    var len = t.length >>> 0;
    if (typeof fun !== "function")
      throw new TypeError();

    var res = [];
    var thisp = arguments[1];
    for (var i = 0; i < len; i++)
    {
      if (i in t)
      {
        var val = t[i]; // in case fun mutates this
        if (fun.call(thisp, val, i, t))
          res.push(val);
      }
    }

    return res;
  };
}

使用Javascript - 重建索引数组

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