Regular Expressions 101

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

Positive Lookahead(?=\.\s*(?:(?:[A-Z]\.\s*)+[A-Z]+,\s*)*(?:[A-Z]\.\s*)+BLAKE)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Non-Capturing Group(?:(?:[A-Z]\.\s*)+[A-Z]+,\s*)*

*repeats the group contents below any number of times:

Non-Capturing Group(?:[A-Z]\.\s*)+

+repeats the group contents below at least once:

Character Class[A-Z]

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Character Class[A-Z]+

+matches at least one character from the set below:

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

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

Non-Capturing Group(?:[A-Z]\.\s*)+

+repeats the group contents below at least once:

Character Class[A-Z]

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

BLAKEthe literal text BLAKE (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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25 tokens

Regular Expression

\d+(?=\.\s*(?:(?:[A-Z]\.\s*)+[A-Z]+,\s*)*(?:[A-Z]\.\s*)+BLAKE)

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