[beta] Regex should reuse the capture group twice

Challenge reuse-patterns-using-capture-groups has an issue. User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0. Please describe how to reproduce this issue, and include links to screenshots if possible.

let repeatNum = "42 42 42";
let reRegex = /(\d+\s)\1/; //
let result = reRegex.test(repeatNum);

As this regex is completely new to me, I’m not exactly sure if this is a bug, but if it isn’t the lessons don’t address it.

Here’s my error: Your regex should reuse the capture group twice.

I’ve gotten all the other tests to pass and I can’t figure out how to tell what it’s doing, but if all the other tests pass then my assumption is that it is running through the capture group twice.

[Manish-Giri]

I’ll take this up…

[chrisdetron]

@voidbringer01 “Your reRegex tests only if it finds 3 numbers in a row. It needs to check whether a string starts with a number and ends with one, while containing 3 numbers. So in 42 42 42 42, it finds a pattern in it even thought its just an substring of it. To fix that instead of let reRegex= /(\d+)\s\1\s\1; use let reRegex=/^(\d+)\s\1\s\1$/; . ^- so that it starts with a number and $ so that it ends with a number.”

why is this the case?