Regular Expressions 101

Explanation

Pro

^start of string

Character Class[Oo]?

?matches at most one character from the set below:

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

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

Character Class[BbPp]?

?matches at most one character from the set below:

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

.*any character (except for line terminators), repeated any number of times

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

Group 1(REP[Ll]*\.?\s*BY|[Oo]+[BbPp]+.*\s*REP)

1st AlternativeREP[Ll]*\.?\s*BY

REPthe literal text REP (case sensitive)

Character Class[Ll]*

*matches any number of characters from the set below:

Lthe literal L (76₁₀ / 114₈ / 4C₁₆) (case sensitive)

lthe literal l (108₁₀ / 154₈ / 6C₁₆) (case sensitive)

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

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

BYthe literal text BY (case sensitive)

2nd Alternative[Oo]+[BbPp]+.*\s*REP

Character Class[Oo]+

+matches at least one character from the set below:

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

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case sensitive)

Character Class[BbPp]+

+matches at least one character from the set below:

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

pthe literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

.*any character (except for line terminators), repeated any number of times

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

REPthe literal text REP (case sensitive)

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25 tokens

^[Oo]?[BbPp]?.*\s*(REP[Ll]*\.?\s*BY|[Oo]+[BbPp]+.*\s*REP)

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