Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight

Re: Count and List Items in a List

by holli (Monsignor)
on Nov 01, 2005 at 16:13 UTC ( #504627=note: print w/replies, xml ) Need Help??

in reply to Count and List Items in a List

You better move that array splitting into your conditional, like so:
if (m/zaps/i) { @zapschool = split (/\t/); print NEWFILE "$zapschool[4]\n"; }
That will give you a performance boost because in your code all line get split, here just the neccessary lines.

Please note (good to impress your boss :) that you can do this in a oneliner:
C:\>perl -naF/\t/ -e "print qq($F[4]\n) if /zaps/" infile>outfile
or the counting:
C:\>perl -naF/\t/ -e "$hash{$F[4]}++ if /zaps/;END{print qq($_\t$hash{ +$_}\n) for sort keys %hash}" infile>outfile

holli, /regexed monk/

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://504627]
[erix]: I saw a common kingfisher and a couple of bullfinches
[erix]: bullfinch ( a male and a female )
erix learned the word 'portaging' not so long ago (from vikings lugging their ships from one river-system to another)
[choroba]: my best run so far
[erix]: I think they build a portaging installation for yachts here not so long ago - lemme google it
[erix]: choroba ah, you should have sprinted 7 s off that :)
[erix]: (but then there's always a next (im)possible goal)
Corion avoids running by starting on time
[choroba]: my phone showed me 1 hour 10 km which was my goal, it changed a bit after uploading to the website

How do I use this? | Other CB clients
Other Users?
Others having an uproarious good time at the Monastery: (11)
As of 2017-05-24 12:48 GMT
Find Nodes?
    Voting Booth?