Regular Expressions 101

\ba Unicode word boundary

sport:the literal text sport: (case sensitive)

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

Group 1(\w+)

\w+a Unicode word character, repeated at least once

Non-Capturing Group(?:(?:(?!\bsport:).)*?\bstyle:\s*(\S+))?

?repeats the group contents below at most once:

Non-Capturing Group(?:(?!\bsport:).)*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!\bsport:)

\ba Unicode word boundary

sport:the literal text sport: (case sensitive)

.any Unicode character (except for line terminators)

\ba Unicode word boundary

style:the literal text style: (case sensitive)

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

Group 2(\S+)

\S+any character that is not Unicode whitespace, repeated at least once

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.

Search reference

Regular Expression

\bsport:\s*(\w+)(?:(?:(?!\bsport:).)*?\bstyle:\s*(\S+))?

New

The following leagues were identified: sport: basketball league: N.B.A. style: c.123>d sport: soccer league: E.P.L. sport: football league: N.F.L. style: c.124>d. The other leagues aren't that important.

Regular Expression

Substitution