如何从JavaScript数组中删除重复对象 [英] How to remove duplicate objects from JavaScript array

问题描述

这是我的代码

var studentsList = [
    {"Id": "101", "name": "siva"},
    {"Id": "101", "name": "siva"},
    {"Id": "102", "name": "hari"},
    {"Id": "103", "name": "rajesh"},
    {"Id": "103", "name": "rajesh"},
    {"Id": "104", "name": "ramesh"},
];

function arrUnique(arr) {
    var cleaned = [];
    studentsList.forEach(function(itm) {
        var unique = true;
        cleaned.forEach(function(itm2) {
            if (_.isEqual(itm, itm2)) unique = false;
        });
        if (unique)  cleaned.push(itm);
    });
    return cleaned;
}

var uniqueStandards = arrUnique(studentsList);

document.body.innerHTML = '<pre>' + JSON.stringify(uniqueStandards, null, 4) + '</pre>';

输出

[
{
    "Id": "101",
    "name": "siva"
},
{
    "Id": "102",
    "name": "hari"
},
{
    "Id": "103",
    "name": "rajesh"
},
{
    "Id": "104",
    "name": "ramesh"
}
]

在上面的代码中，我从JavaScript数组获得了唯一的对象，但是我想删除重复的对象。所以我希望不从数组中获得重复的对象，输出如下 [ { "ID"："102"， "name"："hari" }, { "ID"："104"， "姓名"："拉梅什" } ]

推荐答案

检查此项

    var uniqueStandards = UniqueArraybyId(studentsList ,"id");

    function UniqueArraybyId(collection, keyname) {
              var output = [], 
                  keys = [];

              angular.forEach(collection, function(item) {
                  var key = item[keyname];
                  if(keys.indexOf(key) === -1) {
                      keys.push(key);
                      output.push(item);
                  }
              });
        return output;
   };

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