JS实现的Object数组去重功能示例【数组成员为Object对象】

本文实例讲述了JS实现的Object数组去重功能。分享给大家供大家参考，具体如下：

目标：实现成员为 Object 的数组的去重。

注意，这里的数组成员为 Object，而不是数值或者字符串。

调用方法：

arr = distinct_arr_element(arr);

函数：

/*
 * 在数组中去除重复项（）
 */
var distinct_arr_element = function( arr ){
  if( !arr ) return null ;
  var resultArr = [];
  $(arr).each( function( index, el ){
    var notExist = true ;
    $(resultArr).each( function(i,element){
      if( isObjectValueEqual( el, element ) ){
        notExist = false ;
        return false ;
      }
    });
    if( notExist )
      resultArr.push( el );
  });
  return resultArr ;
}
/*
 * 判断两个 Object 的值是否相等
 */
function isObjectValueEqual(a, b) {
  // Of course, we can do it use for in Create arrays of property names
  var aProps = Object.getOwnPropertyNames(a);
  var bProps = Object.getOwnPropertyNames(b);
  // If number of properties is different, objects are not equivalent
  if (aProps.length != bProps.length) {
    return false;
  }
  for ( var i = 0; i < aProps.length; i++ ) {
    var propName = aProps[i];
    // If values of same property are not equal, objects are not equivalent
    if (a[propName] !== b[propName]) {
      return false;
    }
  }
  // If we made it this far, objects are considered equivalent
  return true;
}

完整测试示例如下：

<script src="http://libs.baidu.com/jquery/2.0.3/jquery.min.js"></script>
<script>
/*
 * 在数组中去除重复项（）
 */
var distinct_arr_element = function( arr ){
  if( !arr ) return null ;
  var resultArr = [];
  $(arr).each( function( index, el ){
    var notExist = true ;
    $(resultArr).each( function(i,element){
      if( isObjectValueEqual( el, element ) ){
        notExist = false ;
        return false ;
      }
    });
    if( notExist ) 
      resultArr.push( el );
  });
  return resultArr ;
}
/*
 * 判断两个 Object 的值是否相等
 */
function isObjectValueEqual(a, b) {
  // Of course, we can do it use for in Create arrays of property names
  var aProps = Object.getOwnPropertyNames(a);
  var bProps = Object.getOwnPropertyNames(b);
  // If number of properties is different, objects are not equivalent
  if (aProps.length != bProps.length) {
    return false;
  }
  for ( var i = 0; i < aProps.length; i++ ) {
    var propName = aProps[i];
    // If values of same property are not equal, objects are not equivalent
    if (a[propName] !== b[propName]) {
      return false;
    }
  }
  // If we made it this far, objects are considered equivalent
  return true;
}
var arrDemo=[{'name':'3water.com'},{'name':'3water.com'},{'age':10},{'age':12}];
console.log(distinct_arr_element(arrDemo))
</script>

使用在线HTML/CSS/JavaScript代码运行工具：http://tools.3water.com/code/HtmlJsRun测试上述代码，可得如下运行结果：