javascript查找并替换字符串中的动态模式 [英] javascript find and replace a dynamic pattern in a string

问题描述

我有一个动态模式，我一直在使用下面的代码来查找

I have a dynamic pattern that I have been using the code below to find

var matcher = new RegExp("%" + dynamicnumber + ":", "g");
var found = matcher.test(textinput);

我需要这个模式有一个新的要求，即包含额外的5个字符的尾随是或否。然后删除它或用''（没有）替换它。

I need the pattern to have a new requirement, which is to include an additional trailing 5 characters of either y or n. And then delete it or replace it with a '' (nothing).

我尝试了这种模式的语法，但显然它不起作用。

I tried this syntax for the pattern, but obviously it does not work.

var matcher = new RegExp("%" + dynamicnumber + ":"  + /([yn]{5})/, "g");

赞赏任何提示

TIA。

推荐答案

您应该只将正则表达式字符串传递给RegExp c'tor：

You should only pass the regex string into the RegExp c'tor :

var re = new RegExp("%" + number + ":"  + "([yn]{5})", "g");

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