javascript - JS - 数组中的重复元素

Question

好吧，我无法解释我要做什么。但我可以解释代码。

我有这个数组:

var array = [{name:"John",lastname:"Doe"},{name:"Alex",lastname:"Bill"},{name:"John",lastname:"Doe"}]

数组包含 2 个重复的元素，我想要一个只显示一次元素重复的函数

当你应用函数时，这将是数组的结果

var array = [{name:"John",lastname:"Doe"},{name:"Alex",lastname:"Bill"}]

Answer 1

你可以用javascript来实现filter以老式方式运行。

var array = [{name:"John",lastname:"Doe"},{name:"Alex",lastname:"Bill"},{name:"John",lastname:"Doe"}]
var names = [];

array = array.filter(function (person) {
   var fn = person.name + '-' + person.lastname;
   if (names.indexOf(fn) !== -1) {
      return false;
   }
   else {
      names.push(fn);
      return true;
   }
});

console.log(array); 
// [{"name":"John","lastname":"Doe"},{"name":"Alex","lastname":"Bill"}]