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Re: Generating a list of numbers from other lists

by Not_a_Number (Parson)
on Jan 29, 2012 at 19:43 UTC ( #950634=note: print w/replies, xml ) Need Help??


in reply to Generating a list of numbers from other lists

Somewhat late, but putting it all together, this is one solution:

use Modern::Perl; use List::Util qw/ max sum /; use autodie; open my $fh1, '<', 'LookingForTheseNumbersList'; chomp ( my @wanted = <$fh1> ); close $fh1; open my $fh2, '<', 'NumbersList'; my %found; while ( <$fh2> ) { if ( /(\d+)\s+(\d+)/ and $1 ~~ @wanted ) { push @{ $found{$1} }, $2; } } close $fh2; for my $k ( sort { $a <=> $b } keys %found ) { my @nums = @{ $found{$k} }; say "All($k): " . join ' ', @nums; # Do some calculations, eg: say "Max($k): " . max @nums; say "Sum($k): " . sum @nums; say "Avg($k): " . ( sum @nums ) / @nums; say ''; # Print newline }

Update; removed '.tmp' suffix from input file names

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[GotToBTru]: I
[GotToBTru]: ve been looking at a document we have been sending to a customer for years now
[MidLifeXis]: We don't, at least in this case ;-)
[GotToBTru]: and it includes a reference number that I didnt recognize
[GotToBTru]: I had to dig into the code to find out where it came from .. and it makes no sense
[GotToBTru]: so I emailed my contact asking if we could just stop sending it .. I'm afraid she is going to ask "what is that anyway?"
[MidLifeXis]: heh.
[MidLifeXis]: Most likely it is a code that some undocumented system, hidden behind layers of IT, deep in the bowels of the building under the machine room floor, reads that code to keep a presence switch from going off. :-b

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