如果数组包含对象，则可以使用此方法删除重复的

const persons= [
      { id: 1, name: 'John',phone:'23' },
      { id: 2, name: 'Jane',phone:'23'},
      { id: 1, name: 'Johnny',phone:'56' },
      { id: 4, name: 'Alice',phone:'67' },
    ];
const unique = [...new Map(persons.map((m) => [m.id, m])).values()];

如果删除基于电话的重复项，只需将m.id替换为m.phone

const unique = [...new Map(persons.map((m) => [m.phone, m])).values()];

您还可以创建一个通用函数，该函数将根据传递给该函数的对象键过滤数组

function getUnique(arr, comp) {

  return arr
   .map(e => e[comp])
   .map((e, i, final) => final.indexOf(e) === i && i)  // store the keys of the unique objects
   .filter(e => arr[e]).map(e => arr[e]); // eliminate the dead keys & store unique objects

 }

你可以这样调用函数，

getUnique(things.thing,'name') // to filter on basis of name

getUnique(things.thing,'place') // to filter on basis of place

另一个选项是创建一个自定义indexOf函数，该函数比较每个对象所选属性的值，并将其包装在reduce函数中。

var uniq = redundant_array.reduce(function(a,b){
      function indexOfProperty (a, b){
          for (var i=0;i<a.length;i++){
              if(a[i].property == b.property){
                   return i;
               }
          }
         return -1;
      }

      if (indexOfProperty(a,b) < 0 ) a.push(b);
        return a;
    },[]);

您也可以使用地图：

const dedupThings = Array.from(things.thing.reduce((m, t) => m.set(t.place, t), new Map()).values());

完整样本：

const things = new Object();

things.thing = new Array();

things.thing.push({place:"here",name:"stuff"});
things.thing.push({place:"there",name:"morestuff"});
things.thing.push({place:"there",name:"morestuff"});

const dedupThings = Array.from(things.thing.reduce((m, t) => m.set(t.place, t), new Map()).values());

console.log(JSON.stringify(dedupThings, null, 4));

结果：

[
    {
        "place": "here",
        "name": "stuff"
    },
    {
        "place": "there",
        "name": "morestuff"
    }
]

任何对象数组的泛型：

/**
* Remove duplicated values without losing information
*/
const removeValues = (items, key) => {
  let tmp = {};

  items.forEach(item => {
    tmp[item[key]] = (!tmp[item[key]]) ? item : Object.assign(tmp[item[key]], item);
  });
  items = [];
  Object.keys(tmp).forEach(key => items.push(tmp[key]));

  return items;
}

希望这对任何人都有帮助。

来源

JSFiddle公司

这将在不传递任何键的情况下删除重复对象。

uniqueArray=a=>[…new Set（.map（o=>JSON.stringify（o））].map（s=>JSON.parse（s））；var objects=[｛'x'：1，'y'：2｝，｛'x'：2，'y':1｝，{'x':1，'y'：2}]；var unique=uniqueArray（对象）；console.log（“原始对象”，对象）；console.log（“唯一”，唯一）；

uniqueArray = a => [...new Set(a.map(o => JSON.stringify(o)))].map(s => JSON.parse(s));

    var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];

    var unique = uniqueArray(objects);
    console.log(objects);
    console.log(unique);