Beefy Boxes and Bandwidth Generously Provided by pair Networks
"be consistent"

Re: (jeffa) Re: array newbie...(sigh)

by PrakashK (Pilgrim)
on Mar 15, 2002 at 20:03 UTC ( #152071=note: print w/ replies, xml ) Need Help??

in reply to (jeffa) Re: array newbie...(sigh)
in thread array newbie...(sigh)

foreach my $pation (@occupation) { `ps -ef|grep -i $pation|grep -v grep|wc -l`; }
Why throw away the results of ps? (What's wrong with using backticks in a void context?)

If the intention is to count the number of instances of interesting programs from the process list, there is no need to repeat the execution of the ps command.

my @programs = qw(netman jobman mailman batchman writer); my @all_procs = `ps -ef`; my %counts; for (@programs) { $counts{$_} = scalar grep {/$_/i} @all_procs; } print "$_ $counts{$_}," for keys %counts; print "\n";

Comment on Re: (jeffa) Re: array newbie...(sigh)
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://152071]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others musing on the Monastery: (12)
As of 2015-11-25 14:46 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (679 votes), past polls