Regular Expressions 101

1st Alternative^(?:.*\bnot?\b.*\bembolism\b.*|.*\bembolism\b.*\bnot?\b.*)

^start of line

Non-Capturing Group(?:.*\bnot?\b.*\bembolism\b.*|.*\bembolism\b.*\bnot?\b.*)

1st Alternative.*\bnot?\b.*\bembolism\b.*

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

\ba Unicode word boundary

nothe literal text no (case insensitive)

t?optionally matches the literal t (116₁₀ / 164₈ / 74₁₆) (case insensitive)

\ba Unicode word boundary

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

\ba Unicode word boundary

embolismthe literal text embolism (case insensitive)

\ba Unicode word boundary

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

2nd Alternative.*\bembolism\b.*\bnot?\b.*

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

\ba Unicode word boundary

embolismthe literal text embolism (case insensitive)

\ba Unicode word boundary

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

\ba Unicode word boundary

nothe literal text no (case insensitive)

t?optionally matches the literal t (116₁₀ / 164₈ / 74₁₆) (case insensitive)

\ba Unicode word boundary

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

2nd Alternative(.*\bembolism\b.*)$

Group 1(.*\bembolism\b.*)

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

\ba Unicode word boundary

embolismthe literal text embolism (case insensitive)

\ba Unicode word boundary

.*any Unicode 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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

x

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25 tokens

Regular Expression

^(?:.*\bnot?\b.*\bembolism\b.*|.*\bembolism\b.*\bnot?\b.*)|(.*\bembolism\b.*)$

Unit Tests

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