Regular Expressions 101

Pro

Positive Lookahead(?=.*\bfoo\b)

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

\ban ASCII word boundary

foothe literal text foo (case sensitive)

\ban ASCII word boundary

Positive Lookahead(?=.*\bbar\b)

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

\ban ASCII word boundary

barthe literal text bar (case sensitive)

\ban ASCII word boundary

Positive Lookahead(?=.*\bfoobar\b)

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

\ban ASCII word boundary

foobarthe literal text foobar (case sensitive)

\ban ASCII word boundary

Positive Lookahead(?=.*\bfootable\b)

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

\ban ASCII word boundary

footablethe literal text footable (case sensitive)

\ban ASCII word boundary

Positive Lookahead(?=.*\bsomebar\b)

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

\ban ASCII word boundary

somebarthe literal text somebar (case sensitive)

\ban ASCII word boundary

^start of line

Non-Capturing Group(?:\w+\s+){4}

{4}repeats the group contents below exactly 4 times:

\w+any word character, repeated at least once

\s+any whitespace character, repeated at least once

\w+any word character, repeated at least once

$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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?=.*\bfoo\b)(?=.*\bbar\b)(?=.*\bfoobar\b)(?=.*\bfootable\b)(?=.*\bsomebar\b)^(?:\w+\s+){4}\w+$

foo bar foobar footable somebar
foo bar footable somebar
foobar foo bar footable somebar
foo bar foobar footable somebar footable
foobar foo bar xyz somebar

Extraction

foo bar foobar footable somebar
foo bar footable somebar
foobar foo bar footable somebar
foo bar foobar footable somebar footable
foobar foo bar xyz somebar