Re: show only numbers before, within or after the text

Luca Villa schreef:
I have a long text file like this:

324yellow
34house
black
54532
15m21red56
44dfdsf8sfd23

How can I obtain (Perl - Windows/commandline/singleline) the
following?

1) only the numbers at the beginning before some alpha text, like
this:

324
34
15
44

2) only the numbers within the alpha text, like this:

21
8

3) only the numbers at the end after some alpha text, like this:

56
23

perl -wnle 'print;/\d/ and /^(\d*)\D*((?:(?<=\D)\d*(?=\D))?)\D*(\d*)$/
and print "|$1|$2|$3|\n" or print ""' data.txt
324yellow
|324|||

34house
|34|||

black

54532
|54532|||

15m21red56
|15|21|56|

44dfdsf8sfd23
|44|8|23|

--
Affijn, Ruud

"Gewoon is een tijger."

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