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="https://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: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:
更多关于JavaScript相关内容还可查看本站专题:《JavaScript数组操作技巧总结》、《JavaScript字符与字符串操作技巧总结》、《JavaScript遍历算法与技巧总结》、《JavaScript查找算法技巧总结》、《JavaScript数学运算用法总结》、《JavaScript数据结构与算法技巧总结》及《JavaScript错误与调试技巧总结》