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Perl: the Markov chain saw

Re: extracting data from file

by 2teez (Priest)
on Nov 15, 2012 at 12:24 UTC ( #1004002=note: print w/replies, xml ) Need Help??

in reply to extracting data from file

Hi shivu126,
Perl hash to the rescue, something like this:

use warnings; use strict; my %data_arrang; while (<DATA>) { my @data = split /, / => $_, 2; push @{ $data_arrang{ shift(@data) } }, @data; } print "Enter your date: "; chomp( my $date = <STDIN> ); if ( exists $data_arrang{$date} ) { print "goods,quality : ", @{ $data_arrang{$date} }; } else { print "Date entered didn't exist\n" } __DATA__ 12-11-2006, books, 100 10-11-2006, bag, 10 10-12-2006, pen, 15

You may want know more about Hash in Perl, split, perldsc
If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
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[hippo]: Can anybody suggest a scalar value of $x for which ($x && !length $x) is true?
[Corion]: hippo: If you have a Unicode-wise Perl then likely some zero-width characters in $x would work. Maybe $x = "\x{200b}" works.
[Corion]: Hmm - no, that outputs 1 for me on 5.14 - perl -wle "my $x = qq(\x{200b}); warn $x; warn length $x"
[hippo]: Smart - I'll give that a go. Thanks.
[hippo]: Ah

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