Regular Expressions 101

Explanation

Pro

\ban ASCII word boundary

Group 1(house|car)

1st Alternativehouse

housethe literal text house (case sensitive)

2nd Alternativecar

carthe literal text car (case sensitive)

Non-Capturing Group(?: (?!(?:house|car)\b)\w+){1,10}

{1,10}repeats the group contents below between 1 and 10 times:

the literal (32₁₀ / 40₈ / 20₁₆)

Negative Lookahead(?!(?:house|car)\b)

Non-Capturing Group(?:house|car)

1st Alternativehouse

housethe literal text house (case sensitive)

2nd Alternativecar

carthe literal text car (case sensitive)

\ban ASCII word boundary

\w+any word character, repeated at least once

the literal (32₁₀ / 40₈ / 20₁₆)

Negative Lookahead(?!\1)

\1the text saved by group 1

Group 2(house|car)

1st Alternativehouse

housethe literal text house (case sensitive)

2nd Alternativecar

carthe literal text car (case sensitive)

\ban ASCII word boundary

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

\b(house|car)(?: (?!(?:house|car)\b)\w+){1,10} (?!\1)(house|car)\b

New

car word1 word2 word3 word4 word5 word6 word7 word8 word9 word10 house
house word1 word2 word3 word4 word5 word6 word7 word8 word9 word10 car


house word1 word2 word3 word4 word5 word6 word7 word8 word9 word10 word 11 car

car test car
house test house
house house house
car car car
this is a test house riding a new car
testing a car when testing a house test test test test test test test test test test test test house