Regular Expressions 101

Pro

^start of line

Group 1(\d{2}:\d{2}:\d{2}[.,]\d{3})

\d{2}a digit, repeated exactly 2 times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d{2}a digit, repeated exactly 2 times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d{2}a digit, repeated exactly 2 times

Character Class[.,]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{3}a digit, repeated exactly 3 times

\sany whitespace character

-->the literal text -->

\sany whitespace character

Group 2(\d{2}:\d{2}:\d{2}[.,]\d{3})

\d{2}a digit, repeated exactly 2 times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d{2}a digit, repeated exactly 2 times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d{2}a digit, repeated exactly 2 times

Character Class[.,]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d{3}a digit, repeated exactly 3 times

\na line-feed (newline) character (ASCII 10)

Group 3(.*(?:\r?\n(?!\r?\n).*)*)

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

Non-Capturing Group(?:\r?\n(?!\r?\n).*)*

*repeats the group contents below any number of times:

\r?optionally matches a carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Negative Lookahead(?!\r?\n)

\r?optionally matches a carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

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

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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26 tokens

^(\d{2}:\d{2}:\d{2}[.,]\d{3})\s-->\s(\d{2}:\d{2}:\d{2}[.,]\d{3})\n(.*(?:\r?\n(?!\r?\n).*)*)

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