本文介绍了限制数组大小的处理方法，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 29岁程序员，3月因学历无情被辞！ 假设我有一个包含数据元素的数组，在此示例中为数字，如下所示：Let's say I have an array with data elements, in this example numbers, like this:var a = [432, 238, 122, 883, 983];我想限制数组，这样每当我向数组添加一个元素时，它总是保持长度为7或更小，并删除最旧的元素。And I want to limit the array, so that everytime I add an element to the array, it always keeps a length of let's say 7, or less and removes the oldest elements.我目前的aproach看起来像这样：My current aproach looks like this:function add(x) { a.unshift(x); a = a.slice(0, 7);}它运作得很好但是没有更优雅的方法可以做它，像一行或什么？It works just fine, but isn't there a more elegant way to do it, like one line or something?编辑：更优雅我是说我不需要添加功能而且很容易内联我需要它的代码，没有输入例如三次，只有一行也会使代码更清晰By "more elegant" I mean so that I don't need the add function and just easily could inline the code where I need it, without typing out a for example three times, and only having one line would also make the code "clearer"推荐答案只是添加另一种可能的选择：Just to add another possible alternative:a = [x, ...a.slice(0, 6)];即使我个人选择 Nina Scholz 的解决方案（改变长度的更好条件对于不支持ES6的旧环境）Even though I would personally choose Nina Scholz's solution (with a "better" condition for changing length and for older environments where ES6 is not supported)参考文献： Spread operatorSpread operator 这篇关于限制数组大小的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！
