根据提供的长度将重复的对象创建到数组中

本文介绍了根据提供的长度将重复的对象创建到数组中的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

限时送ChatGPT账号..

我想根据这样提供的长度将重复的值插入到数组中:

I want to insert duplicate values into array based on length provided like this:

var a = [{displayName: 'bar'}, {displayName:'google'}, {displayName:'mod'}];;
var dataTypesLength= 4;

输出应该是这样的:

var a = [{displayName: 'bar'},{displayName: 'bar'},{displayName: 'bar'},{displayName: 'bar'}, {displayName:'google'},{displayName:'google'},{displayName:'google'},{displayName:'google'}, {displayName:'mod'}, {displayName:'mod'}, {displayName:'mod'}, {displayName:'mod'}];

我试过了:

a = a.flatMap( word => Array.from({ dataTypesLength}).fill( word ));

但我收到打字稿错误说:Argument of type '{ dataTypesLength: any;}' 不可分配给类型为 'ArrayLike<{}>' 的参数.对象字面量只能指定已知属性，并且类型 'ArrayLike<{}>'

but I am getting typescript error saying: Argument of type '{ dataTypesLength: any; }' is not assignable to parameter of type 'ArrayLike<{}>'. Object literal may only specify known properties, and 'dataTypesLength' does not exist in type 'ArrayLike<{}>'

推荐答案

您可以将 map 与 Object.assign 一起使用，这样每个对象都有独立的引用

You can use map with Object.assign so that each object will have independent reference

var a = [{displayName: 'bar'}, {displayName:'google'}, {displayName:'mod'}];
var dataTypesLength= 4;

a= a.map(obj => { return Array(dataTypesLength).fill(null).map( e => Object.assign({}, obj)) }).flat();
console.log(a)

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