Regular Expressions 101

Explanation

Pro

\Gstart of current search

Character Class[A-Z]*?

*?matches any number of characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Atomic Group(?>\W*\b(?>\w+\W+)*?(?=(?:STREET|AVENUE|BOULEVARD)\b))?

?repeats the group contents below at most once:

\W*any non-word character, repeated any number of times

\ban ASCII word boundary

Atomic Group(?>\w+\W+)*?

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

\w+any word character, repeated at least once

\W+any non-word character, repeated at least once

Positive Lookahead(?=(?:STREET|AVENUE|BOULEVARD)\b)

Non-Capturing Group(?:STREET|AVENUE|BOULEVARD)

1st AlternativeSTREET

STREETthe literal text STREET (case sensitive)

2nd AlternativeAVENUE

AVENUEthe literal text AVENUE (case sensitive)

3rd AlternativeBOULEVARD

BOULEVARDthe literal text BOULEVARD (case sensitive)

\ban ASCII word boundary

Character Class[A-Z]*?

*?matches any number of characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

Non-Capturing Group(?:TREE\B|E(?:NU)?\B|OU\B|AR\B)

1st AlternativeTREE\B

TREEthe literal text TREE (case sensitive)

\Bnot an ASCII word boundary

2nd AlternativeE(?:NU)?\B

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

Non-Capturing Group(?:NU)?

?repeats the group contents below at most once:

NUthe literal text NU (case sensitive)

\Bnot an ASCII word boundary

3rd AlternativeOU\B

OUthe literal text OU (case sensitive)

\Bnot an ASCII word boundary

4th AlternativeAR\B

ARthe literal text AR (case sensitive)

\Bnot an ASCII word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

A modifier: Anchored. Forces the pattern to match only at the start of the search

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

\G[A-Z]*?(?>\W*\b(?>\w+\W+)*?(?=(?:STREET|AVENUE|BOULEVARD)\b))?[A-Z]*?\K(?:TREE\B|E(?:NU)?\B|OU\B|AR\B)

New

I live on 56 something STREET
I live on 56 something AVENUE
I live on 56 something BOULEVARD TREE BOULEVAR VENUE

Substitution

I live on 56 something STREET
I live on 56 something AVENUE
I live on 56 something BOULEVARD TREE BOULEVAR VENUE