Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

Re: List manipulation

by Not_a_Number (Parson)
on May 31, 2012 at 18:47 UTC ( #973586=note: print w/ replies, xml ) Need Help??


in reply to List manipulation

use 5.010; my %parsed; while ( <DATA> ){ my @tmp = split; $parsed{$tmp[0]}{x1}++ if $tmp[1] eq '1_x'; $parsed{$tmp[0]}{c3}++ if @tmp > 2; } for my $k ( sort keys %parsed ) { say join ' ', $k, $parsed{$k}->{x1}, $parsed{$k}->{c3}; } __DATA__ A 1_x 9_z A 1_x A 1_x g_z B 2_c B 1_x 1_z C 1_x 1_z C v_x 8_z

Update: The output part of the above code breaks for a given ID if (a) '1_x' never appears in column 2, or (b) '1_x' appears in column 2 but there is never a third column for this ID. To understand what I mean, add the following lines to __DATA__:

D v_x s_x E 1_x

Solution: change the line in the for loop to:

  say join ' ', $k, $parsed{$k}->{x1} || 0, $parsed{$k}->{c3} || 0;


Comment on Re: List manipulation
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://973586]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others chilling in the Monastery: (10)
As of 2015-07-07 11:33 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (88 votes), past polls