JavaScript

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JS实现的Object数组去重功能示例【数组成员为Object对象】

更新时间:2020-08-13 20:12:01 作者:startmvc
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

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':'jb51.net'},{'name':'jb51.net'},{'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.jb51.net/code/HtmlJsRun测试上述代码,可得如下运行结果:

PS:这里再为大家提供几款相关工具供大家参考使用:

在线去除重复项工具: http://tools.jb51.net/code/quchong

在线文本去重复工具: http://tools.jb51.net/aideddesign/txt_quchong

JS Object数组 去重