Javascript：字符串中出现字符的次数 [英] Javascript: How many times a character occurs in a string

问题描述

是否有一种简单的方法可以检查字符在字符串中出现的次数？

Is there a simple way to check how many times a character appears in a String?

推荐答案

您可以删除任何其他字符字符串中的字符并检查长度：

You could remove any other character in the string and check the length:

str.replace(/[^a]/g, "").length

这里计算了多少 a s在 str 。

Here it is counted how many as are in str.

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