Regular Expressions 101

^start of line

Negative Lookahead(?!.*\bjack\b.*\bjack\b|.*\bjames\b.*\bjames\b)

1st Alternative.*\bjack\b.*\bjack\b

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

\ban ASCII word boundary

jackthe literal text jack (case sensitive)

\ban ASCII word boundary

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

\ban ASCII word boundary

jackthe literal text jack (case sensitive)

\ban ASCII word boundary

2nd Alternative.*\bjames\b.*\bjames\b

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

\ban ASCII word boundary

jamesthe literal text james (case sensitive)

\ban ASCII word boundary

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

\ban ASCII word boundary

jamesthe literal text james (case sensitive)

\ban ASCII word boundary

Positive Lookahead(?=.*\bjack\b.*\bjames\b)

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

\ban ASCII word boundary

jackthe literal text jack (case sensitive)

\ban ASCII word boundary

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

\ban ASCII word boundary

jamesthe literal text james (case sensitive)

\ban ASCII word boundary

.*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

^(?!.*\bjack\b.*\bjack\b|.*\bjames\b.*\bjames\b)(?=.*\bjack\b.*\bjames\b).*$

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