Regular Expressions 101

Pro

^start of line

.{48}any character (except for line terminators), repeated exactly 48 times

Positive Lookahead(?=.{10}(.*))

.{10}any character (except for line terminators), repeated exactly 10 times

Group 1(.*)

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

0*the literal 0 (48₁₀ / 60₈ / 30₁₆) , repeated any number of times

Group 2(.*?)

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

Positive Lookahead(?=\1)

\1the text saved by group 1

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

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.

26 tokens

^.{48}(?=.{10}(.*))0*(.*?)(?=\1).*

020075307354H         021133360876      981497910079937800ABC              CDE

$2

020075307354H         021133360876      981497910079937800ABC              CDE