Regular Expressions 101

Pro

\d+a digit, repeated at least once

Athe literal A (65₁₀ / 101₈ / 41₁₆) (case sensitive)

Positive Lookahead(?=.* X )

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

X the literal text X (case sensitive)

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

\d+A(?=.* X )

New

50A ABC DE 51A FG X 52A HI 53A
50A ABD DE 51A FG 52A HI 53A

50A ABC DE 51A FG X 52A HI 53A
50A ABD DE 51A FG 52A HI 53A