如何按值从数组中删除项目? [英] How to remove item from array by value?

问题描述

是否有从 JavaScript 数组中删除项目的方法?

给定一个数组:

var ary = ['three', 'seven', 'eleven'];

我想做类似的事情:

removeItem('seven', ary);

我已经研究了 splice() 但这只能通过位置编号删除，而我需要一些东西来通过其值删除项目.

解决方案

您可以使用 indexOf 方法 像这样:

var index = array.indexOf(item);如果(索引！== -1){array.splice(index, 1);}

<块引用>

注意:你会需要为 IE8 及以下版本添加垫片

var array = [1,2,3,4]变量项目 = 3var index = array.indexOf(item);array.splice(index, 1);console.log(array)

Is there a method to remove an item from a JavaScript array?

Given an array:

var ary = ['three', 'seven', 'eleven'];

I would like to do something like:

removeItem('seven', ary);

I've looked into splice() but that only removes by the position number, whereas I need something to remove an item by its value.

解决方案

You can use the indexOf method like this:

var index = array.indexOf(item);
if (index !== -1) {
  array.splice(index, 1);
}

Note: You'll need to shim it for IE8 and below

var array = [1,2,3,4]
var item = 3

var index = array.indexOf(item);
array.splice(index, 1);

console.log(array)

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