本文介绍了在正则表达式/Javascript中将字符交换为另一个的处理方法,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
我正在做类似的事情:
var a = "This is an A B pattern: ABABA"; a.replace("A", "B"); a.replace("B", "A");并返回:=>这是一个B A模式:BABAB" 代替:=>这是一个A A模式:AAAAA"
and have it return: => "This is an B A pattern: BABAB" instead of: => "This is an A A pattern: AAAAA"
我首先想到的是做类似的事情:
My first thought is to do something like:
a.replace("A", "improbablePattern"); a.replace("B", "A"); a.replace("improbablePattern", "B");我该怎么做呢?
推荐答案您可以将函数传递给 .replace() 调用与两个匹配的正则表达式,如下所示:
You could pass a function to your .replace() call with the regex that matches both, like this:
var a = "This is an A B pattern: ABABA"; a = a.replace(/(A|B)/g, function(a, m) { return m == "A" ? "B" : "A"; }); alert(a); //alerts "This is an B A pattern: BABAB"您可以在此处尝试
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在正则表达式/Javascript中将字符交换为另一个
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