Reuse Patterns Using Capture Groups ( RegEx group check )

[Dayfiri]

Reuse Patterns Using Capture Groups struggle

You can transform /^(\d+)\s\1\s\1$/ to: ^(\d+) that matches a certain group (in this case any number) and anchor ^ says it must be beginning of the string, and brackets ( ) captures it for later use. \s that matches one space. \1 matches group captured in point one. \s that matches one space. \1$ matches group captured in point one and anchor $ says it must be the end of the string. Therefore we have three identical groups separated by space and two conditions: group 1 must be at the beg…