从数组中删除一个元素，在 Javascript 中指定一个值 [英] Removing an element from an array specifying a value in Javascript

问题描述

我已经阅读了这个问题:

I have read this question:

在 JavaScript 中删除数组元素 - 删除与拼接

而且似乎 splice 和 delete 都需要元素的索引才能删除，那么当我有值时如何轻松找到索引?

And it appears that both splice and delete require an index of the element in order to remove, so how can I easily find the index when I have the value?

例如，如果我有一个如下所示的数组:

For example if I have an array that looks like this:

["test1", "test2", "test3"]

我想删除 test2.我现在正在使用的过程，我希望这不是正确的方法，是使用 $.each 检查数组中每个元素的值，通过process(用作索引引用)，如果该值等于test2"，那么我就有了我的索引(以计数器的形式)，然后使用 splice 将其删除.

and I want to remove test2. The process I am using right now, which I'm hoping isn't the correct way to do it, is using $.each checking the value of each element in the array, maintaining a counter through the process (used as the index reference) and if the value is equal to "test2", then I have my index (in form of the counter) and then use splice to remove it.

当数组变大时，我认为这将是一个缓慢的过程，但我有什么替代方案?

While the array grows larger, I would imagine this would be a slow process, but what alternatives do I have?

推荐答案

您想使用 splice() 函数删除项目，indexOf 会在数组中找到它:

You want to use the splice() function to remove the item, indexOf will find it in the array:

在数组中查找特定元素:(知道要删除哪个)

var index = array.indexOf('test2'); 

完整示例:

var array = ['test1', 'test2', 'test3'];
var value_to_remove = 'test2';
array.splice(array.indexOf(value_to_remove), 1); 

工作演示

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