正则表达式匹配长度超过 5 个字符且有两个连续数字的密码 [英] regex to match passwords that are greater than 5 characters long and have two consecutive digits

问题描述

这就是我所拥有的，有人可以告诉我我错在哪里吗?

Here's what I have, can someone please tell me where I am wrong?

let sampleWord = "bana12";
let pwRegex = /(?=\w{5})(?=\d{2,})/; // Change this line
let result = pwRegex.test(sampleWord);
console.log(result);

它适用于仅包含字母或仅包含数字的密码，但不适用于两者.

It works for passwords that contain only letters or only numbers, but not for both.

推荐答案

在 \d{2} 之前使用 .* 因为连续的数字可能出现在字符串的任何位置.您当前的正则表达式应该首先检查是否存在两位数字.

Use .* before \d{2} since the consecutive digits may occur anywhere in the string. Your current regex should check for two digits to be present at very first.

let sampleWord = "bana12";
let pwRegex = /^(?=\w{5})(?=.*\d{2,})/; // Change this line
console.log( pwRegex.test(sampleWord))

请注意， \w 仅匹配单词字符，因此如果输入字符串包含 5 个非单词字符，则您的正则表达式将失败.所以为了检查字符串长度，最好使用. 而不是\w.

Note that \w matches only the word characters, so your regex fails if there input string contain 5 non-word characters. So for checking the string length, it's better to use . instead of \w.

let pwRegex = /^(?=.{5})(?=.*\d{2,})/;

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