javascript - 如何停止Javascript forEach？ [重复](how to stop Javascript forEach? [duplicate])

Question

This question already has an answer here:(这个问题在这里已有答案：)

Short circuit Array.forEach like calling break 28 answers(短路Array.forEach就像调用break 28的答案)

i'm playing with nodejs and mongoose — trying to find specific comment in deep comments nesting with recursive func and foreach within.(我正在玩nodejs和mongoose - 尝试在深层注释中找到特定注释，并使用递归函数和foreach进行嵌套。)

Is there a way to stop nodejs forEach?(有没有办法阻止nodejs forEach？) As i understand every forEach iteration is a function and and i can't just do "break",only "return" but this won't stop foreach.(据我所知，每个forEach迭代都是一个函数而且我不能只做“休息”，只能“返回”，但这不会阻止foreach。) function recurs(comment){ comment.comments.forEach(function(elem){ recurs(elem); //if(...) break; }); }   ask by kulebyashik translate from so

Answer 1

You can't break from a forEach .(你无法打破forEach 。)

I can think of three ways to fake it, though.(不过，我可以想到三种方法来伪造它。) 1. The Ugly Way : pass a second argument to forEach to use as context , and store a boolean in there, then use an if .(1. Ugly Way ：将第二个参数传递给forEach以用作上下文 ，并在其中存储一个布尔值，然后使用if 。) This looks awful.(这看起来很糟糕。) 2. The Controversial Way : surround the whole thing in a try-catch block and throw an exception when you want to break.(2.有争议的方式 ：在try-catch块中包围整个事物，并在你想要破解时抛出异常。) This looks pretty bad and may affect performance , but can be encapsulated.(这看起来很糟糕， 可能会影响性能 ，但可以封装。) 3. The Fun Way : use every() .(3.有趣的方式 ：使用every() 。) ['a', 'b', 'c'].every(function(element, index) { // Do your thing, then: if (you_want_to_break) return false else return true }) You can use some() instead, if you'd rather return true to break.(你可以使用some()代替，如果你宁愿return true来休息。)