Regular Expressions 101

Positive Lookahead(?=.*[0-9])

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

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 1(.*)

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

Positive Lookbehind(?<=is)

isthe literal text is (case sensitive)

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?=.*[0-9])(.*)(?<=is)

New

1 one line is here
2 second line is here
3 third line is here
4 fourth line is here
5 so on is here
6 possibly is more here