Regular Expressions 101

\ba Unicode word boundary

Non-Capturing Group(?:O|S|SO|OH|OS)

1st AlternativeO

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

2nd AlternativeS

Sthe literal S (83₁₀ / 123₈ / 53₁₆) (case sensitive)

3rd AlternativeSO

SOthe literal text SO (case sensitive)

4th AlternativeOH

OHthe literal text OH (case sensitive)

5th AlternativeOS

OSthe literal text OS (case sensitive)

\ba Unicode word boundary

Non-Capturing Group(?:\s?[-+*°.1-9]){0,4}

{0,4}repeats the group contents below between 0 and 4 times:

\s?optionally matches a Unicode whitespace character

Character Class[-+*°.1-9]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

°the literal ° (176₁₀ / 260₈ / B0₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

1-9one character from 1 (49₁₀) to 9 (57₁₀)

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

\b(?:O|S|SO|OH|OS)\b(?:\s?[-+*°.1-9]){0,4}

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