JS實現的Object數組去重功能示例【數組成員為Object對象】

2019-11-19 12:10:52

字體：大中小

來源：轉載

供稿：網友

本文實例講述了JS實現的Object數組去重功能。分享給大家供大家參考，具體如下：

目標：實現成員為 Object 的數組的去重。

注意，這里的數組成員為 Object，而不是數值或者字符串。

調用方法：

arr = distinct_arr_element(arr);

函數：

/* * 在數組中去除重復項（） */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 ;}/* * 判斷兩個 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;}

完整測試示例如下：

<script src="http://libs.baidu.com/jquery/2.0.3/jquery.min.js"></script><script>/* * 在數組中去除重復項（） */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 ;}/* * 判斷兩個 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':'VeVB.COm'},{'name':'VeVB.COm'},{'age':10},{'age':12}];console.log(distinct_arr_element(arrDemo))</script>

使用在線HTML/CSS/JavaScript代碼運行工具：http://tools.VeVB.COm/code/HtmlJsRun測試上述代碼，可得如下運行結果：