JS去除数组重复值的四种不同方法

复制代码 代码如下:

  /// <summary>2 /// 回车键按钮事件(此方法需要在页面加载完后执行,比如在Jquery中的ready中调用)--方法一

  /// </summary>

  /// 调用示例:

  /// var v_Array = new Array(1, 2, 3, 4, 5, 6, 7, 3, 3, 2, 2, 4, 2, 1, 1, 3);

  /// var v_ArrayResult = v_Array.deleteEle();

  /// alert(v_ArrayResult); //返回结果:, 2, 3, 4, 5, 6, 7

  Array.prototype.deleteEle = function () {

  var o = {}, newArr = [], i, j;

  for (i = 0; i < this.length; i++) {

  if (typeof (o[this[i]]) == "undefined") {

  o[this[i]] = "";

  }

  }

  for (j in o) {

  newArr.push(j)

  }

  return newArr;

  }

  /// <summary>

  /// 回车键按钮事件(此方法需要在页面加载完后执行,比如在Jquery中的ready中调用)--方法二

  /// </summary>

  /// 调用示例:

  /// var v_Array = new Array(1, 2, 3, 4, 5, 6, 7, 3, 3, 2, 2, 4, 2, 1, 1, 3);

  /// var v_ArrayResult = v_Array.deleteEleReg();

  /// alert(v_ArrayResult); //返回结果:, 2, 3, 4, 5, 6, 7

  Array.prototype.deleteEleReg = function () {

  return this.reverse().join(",").match(/([^,]+)(?!.*\1)/ig).reverse();

  }

  /// <summary>

  /// 回车键按钮事件(此方法需要在页面加载完后执行,比如在Jquery中的ready中调用)--方法三

  /// </summary>

  /// <param name="array">数组</param>

  /// 调用示例:

  /// var v_Array = new Array(1, 2, 3, 4, 5, 6, 7, 3, 3, 2, 2, 4, 2, 1, 1, 3);

  /// alert(unique(v_Array)); //返回结果:, 2, 3, 4, 5, 6, 7

  function deleteEleFunction(array) {

  var ret = [], record = {}, it, tmp, obj = "__object__", bak = [], i, len;

  var type = {

  "number": function (n) { return "__number__" + n; },

  "string": function (n) { return "__string__" + n; },

  "boolean": function (n) { return "__boolean__" + n; },

  "undefined": function (n) { return "__undefined__"; },

  "object": function (n) {

  return n === null ? "__null__" : obj in n ? n[obj] : (n[obj] = obj + bak.push(n));

  }

  };

  for (i = 0, len = array.length; i < len; i++) {

  it = array[i]; tmp = type[typeof it](it);

  if (!(tmp in record)) { ret.push(it); record[tmp] = true; }

  }

  for (i = 0, len = bak.length; i < len; delete bak[i++][obj]) { }

  return ret;

  };

  /// <summary>< xmlnamespace prefix ="o" ns ="urn:schemas-microsoft-com:office:office" />

  /// 回车键按钮事件(此方法需要在页面加载完后执行,比如在Jquery中的ready中调用)--方法四

  /// </summary>

  /// 调用示例:

  /// var v_Array = new Array(1, 2, 3, 4, 5, 6, 7, 3, 3, 2, 2, 4, 2, 1, 1, 3);

  /// var v_ArrayResult = v_Array.deleteEleDis();

  /// alert(v_ArrayResult); //返回结果:, 2, 3, 4, 5, 6, 7

  Array.prototype.deleteEleDis = function () {

  var a = [], b = [];

  for (var prop in this) {

  var d = this[prop];

  if (d === a[prop]) continue; //防止循环到prototype

  if (b[d] != 1) {

  a.push(d);

  b[d] = 1;

  }

  }

  return a;

  }