I need someone to explain this answer to me because I don’t understand how it works and I don’t feel the explanation on the page is particularly clear. The number part I just don’t get.
I got this far:
/(\d+)\s\1/
but the answer is:
/^(\d+)\s\1\s\1$/;
How does it check three times? Why can’t you do:
/(\d+\s)\1\1/;
that last one, you need an extra space at the end so it can’t work
in the first one you match two consecutive numbers, not three
I’m sorry I don’t follow what do you mean?
this one has a space in the capture group so it’s like /(\d+\s)(\d+\s)(\d+\s)/, it doesn’t match something like "32 32 32" because this regex is searching for an extra space at the end
this one is like /(\d+)\s(\d+)/, it matches "32 32" which should not be matched as it is too short
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