Hello mrityunjaynath,

If you say split(/X/, $string), then $string is split into chunks separated by whatever is matched by X. For example, in this one-liner:

18:05 >perl -MData::Dump -wE "my $s = 'Hello1234world!5678How9012are34
+56you?'; my @w = split /[0-9]{4}/, $s; dd \@w;"
["Hello", "world!", "How", "are", "you?"]

18:06 >

[download]

the string is split on 4-digit groups, and the array @w is populated with the words in $s which come between those digits.

To capture the digit groups, you could try to split on non-digits, but it’s much better (and more straightforward) to use a regular expression with a /g modifier, like this:

open(my $CFILE, '<', 'config.txt') or die "Couldn't open file 'config.
+txt' for reading: $!";
$readline = <$CFILE>;
@words = $readline =~ /([0-9]{4})/g;

[download]

as demonstrated in this one-liner:

18:06 >perl -MData::Dump -wE "my $s = 'Hello1234world!5678How9012are34
+56you?'; my @w = $s =~ /([0-9]{4})/g; dd \@w;"
[1234, 5678, 9012, 3456]

18:18 >

[download]

See split and perlretut.

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re^3: warning: use of uninitialized value by Athanasius
in thread warning: use of uninitialized value by mrityunjaynath

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