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Re^3: Regular Expressions question

by Lotus1 (Deacon)
on Oct 30, 2012 at 03:24 UTC ( #1001449=note: print w/replies, xml ) Need Help??

in reply to Re^2: Regular Expressions question
in thread Regular Expressions question

my @check = grep { chomp $_; $_ } <DATA>;

Map should be used for this not grep. Consider the following.

use warnings; use strict; my @check = grep { chomp $_; $_ } <DATA>; print ">>@check<<" __DATA__ line1 0 line3

The output is:

>>line1 line3<<

Grep looks at the value the block returns and if true it returns $_. Map is used to do something to each element and pass along the result from each.

To me it is clearer and simpler to do this:

my @check = <DATA>; chomp @check;

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