Regex carat (^) symbol

JavaScript
#1

Tell us what’s happening:

I’m confused. The ^ negates a character set, right?

So why does this solution call for /^(\d+)\s\1\s\1$/ ? Does the carat work differently here? How??

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Challenge: Reuse Patterns Using Capture Groups

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#2

Yes, when used in a character set:

[^a-z] // not a-z

Yes, it is used at the beginning of the regex so it means to anchor the regex to the beginning of the string. In other words, no other characters can come before it.

/^(\d+)

“0…” matches.

“a0…” does not match.

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#3

I see so it has a whole another use. Thanks!

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