Regular Expressions 101

Non-Capturing Group(?:\s*(\d+)x(\w+)\s*)+

+repeats the group contents below at least once:

\s*a Unicode whitespace character, repeated any number of times

Group 1(\d+)

\d+a Unicode decimal digit, repeated at least once

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Group 2(\w+)

\w+a Unicode word character, repeated at least once

\s*a Unicode whitespace character, repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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Regular Expression

(?:\s*(\d+)x(\w+)\s*)+

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