Regular Expressions 101

Explanation
Pro

\ban ASCII word boundary

Character Class[A-Z]

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

Character Class[a-z]*

*matches any number of characters from the set below:

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

Non-Capturing Group(?:_?[A-Z][a-z]*)*

*repeats the group contents below any number of times:

_?optionally matches the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[A-Z]

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

Character Class[a-z]*

*matches any number of characters from the set below:

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

\ban ASCII word boundary

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

\b[A-Z][a-z]*(?:_?[A-Z][a-z]*)*\b

New

snake_case and PascalCase naming conventions. So, declaring a class its name must match the following format strictly: Pascal_Snake, Pascal_Snake_Pascal_Etc, OnlyPascal, Pascal.