Regular Expressions 101

<the literal < (60₁₀ / 74₈ / 3C₁₆)

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

@+the literal @ (64₁₀ / 100₈ / 40₁₆) , repeated at least once

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

Positive Lookahead(?=<@|$)

1st Alternative<@

<@the literal text <@

2nd Alternative$

$end of line

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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Regular Expression

<\s*@+.*?(?=<@|$)

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