Regular Expressions 101

^start of line

Negative Lookahead(?!.* (REV|LIB) .*)

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

the literal (32₁₀ / 40₈ / 20₁₆)

Group 1(REV|LIB)

1st AlternativeREV

REVthe literal text REV (case sensitive)

2nd AlternativeLIB

LIBthe literal text LIB (case sensitive)

the literal (32₁₀ / 40₈ / 20₁₆)

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

COM the literal text COM (case sensitive)

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

$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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Search reference

Regular Expression

^(?!.* (REV|LIB) .*).* COM .*$

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