Javascript正则表达式匹配字符串，后跟数字吗? [英] Javascript regular expression match on string followed by number?

问题描述

我有一个格式为string:num的字符串，其中num是任何数字，但string是我需要匹配的已知字符串.我想在if语句中添加以下内容:

I have a string of the format: string:num where num is any number but string is a known string that I need to match on. I'd like to have this in an if statement as:

if( it matches 'string:' followed by a number) {
   //do something
}

推荐答案

您要...

if (stringYouHave.match(/^string:([0-9]+)$/)) {
    // do something
}

这包括:

1. ^字符串的开头
2. string:您提到的文字字符串:"
3. (.....)此子表达式，如果您需要知道字符串中的 编号，可以稍后使用(尽管在这种情况下，您也可以将'string:'替换为'')
在0和9之间的
4. [0-9] a 字符(即数字)
5. +必须至少有一个那些"(即上述数字)，但可以有任何数字
6. $字符串的结尾

1. ^ beginning of the string
2. string: the literal "string:" you mentioned
3. (.....) This subexpression, which you can refer to later if you need to know which number is in the string (though in this particular case, you could also just replace 'string:' with '')
4. [0-9] a character between 0 and 9 (i.e., a digit)
5. + Must have at least one "of those" (i.e., digits mentioned above), but can have any number
6. $ end of the string

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