JS实现的Object数组去重功能示例【数组成员为Object对象】
lmn13 人气:0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.softyun.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.softyun.net/code/quchong
在线文本去重复工具:
http://tools.softyun.net/aideddesign/txt_quchong
希望本文所述对大家JavaScript程序设计有所帮助。
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