comment on

my @extract;
while (<DATA>) {
   push @extract,m/\d{8}/g;
}
print join "\n",@extract;
__DATA__
1,10000021
2,10000023
2,10000035
3,10000043
10000023
10000035
10000043
10000045
10000060
10000043,,zrous
10000045,,sjandw
10000060,,jnbro2
10000063,,eedwa
10000067,,empav
10000021/1
10000023/1
10000035/1
10000043/1
10000045/1
10000060/1
10000021/1,10000021
10000023/1,10000023
10000035/1,10000035
10000112,10002524,10000998,10000071,10000043,10000612,10000018,1000011
+0,10000011,10000013
[download]

Outputs:

Of course you could also write that as

my @extracted=map { m/\d{8}/g } <DATA>;
[download]

HTH

Yves / DeMerphq
---
Software Engineering is Programming when you can't. -- E. W. Dijkstra (RIP)

In reply to Re: regular expression to extract 8 digit number from files by demerphq
in thread regular expression to extract 8 digit number from files by Anonymous Monk

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		`&`
	<		`<`
	>		`>`
	[		`[`
	]		`]`

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.