问题描述
我有一个包含对象电子邮件和 ID 的数组,所以我想删除具有相似 ID 的重复元素.
I have array with obejcts email and Id so I want delete duplicate elements who have similar ID's.
例子:
var newarray=[ { Email:"test1@gmail.com", ID:"A" }, { Email:"test2@gmail.com", ID:"B" }, { Email:"test3@gmail.com", ID:"A" }, { Email:"test4@gmail.com", ID:"C" }, { Email:"test4@gmail.com", ID:"C" } ];
现在我需要删除具有 ID 的重复元素很常见.因此我期望最终的数组是
Now I need to delete Duplicate elements which have ID's are common.In the sence I am expecting final Array is
var FinalArray=[ { Email:"test1@gmail.com", ID:"A" }, { Email:"test2@gmail.com", ID:"B" }, { Email:"test5@gmail.com", ID:"C" } ];
推荐答案
使用 Array.prototype.filter 过滤掉元素并检查重复项,使用 temp 数组
Use Array.prototype.filter to filter out the elements and to keep a check of duplicates use a temp array
var newarray = [{ Email: "test1@gmail.com", ID: "A" }, { Email: "test2@gmail.com", ID: "B" }, { Email: "test3@gmail.com", ID: "A" }, { Email: "test4@gmail.com", ID: "C" }, { Email: "test5@gmail.com", ID: "C" }]; // Array to keep track of duplicates var dups = []; var arr = newarray.filter(function(el) { // If it is not a duplicate, return true if (dups.indexOf(el.ID) == -1) { dups.push(el.ID); return true; } return false; }); console.log(arr);