Sorting a list by Secondary Key

[joeke3el]

Hi everyone,

I have not touched Perl in the last 4 years, my books are at work and I have something here I'm struggling to figure out. From a known list of servers, I need to gather up how many clearcase views are on each server and then only choose the one that has the least number of views that given day. This is what I have so far.

my @servers = qw (
srv30bld4
srv30bld5
srv40bld2
srv40bld3
srv40bld4
);
foreach (@servers) {
my @view = `$CT lsview -short -host $_ | wc -l`;

I'm running the clearcase command "lsview" on each server and doing a wc so I know just how many views came back. The result I get is as follows.

srv30bld4 92
srv30bld5 0
srv40bld2 58
srv40bld3 3
srv40bld4 2

So now I know how many clearcase views are on each server but I only want the one with the lowest amount. I'm having difficulty sorting this list. Any help is appreciated.

Thanks.

[KevinADC]

assuming @view is what needs sorting:

@view = ('srv30bld4 92','srv30bld5 0','srv40bld2 58','srv40bld3 3','srv40bld4 2');
@view = map {$_->[0]} sort {$a->[1] <=> $b->[1]} map {chomp;[$_, /\s+(\d+)$/]} @view;
print $view[0];

but what if there are two or more servers with the same number of minimum views?

[joeke3el]

but what if there are two or more servers with the same number of minimum views?

Thanks for taking the time to reply Kevin, I really appreciate this. I tried running this with more than one server set to the same number of views and it picks the one it comes across first in the list. This is fine as this code will be placed in a pre-existing script that people use to create views. We're just trying to prevent an imbalance of views across the five servers that are available. If there is a tie among the lowest number of views, as long as one of them gets picked during a given round that'll work.

Again, thanks so much.

Joe

[docsnyder]

@joeke3el

If you want to read more about the backgrounds of Kevin's solution, it's called the "Schwarztian Transform".

Greetz, Doc