Regular Expressions 101

Group 1([A-Za-z0-9-]+)

Character Class[A-Za-z0-9-]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2(\.md)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

mdthe literal text md (case sensitive)

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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Search reference

Regular Expression

([A-Za-z0-9-]+)(\.md)

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