Mike Gillis <> wrote:
> Chris Prather wrote:
>> my %names = (@fieldspecs);
>> my @names = keys %names; # works if the files are *always* evenly
>> paired
>
> The problem with this is that it doesn't preserve order.
>
> $ perl -le 'my %names = qw(a 1 b 1 c 1); print join(", ", keys
> %names);'
> c, a, b
You can preserve the order with Tie::IxHash, e.g.
--------------------------------------
use strict;
use warnings;
use Tie::IxHash;
my @fieldspecs = qw
(
JobNum 14
ProjectID 25
PartNum2 50
ProdQty13 15.2
);
tie my %hash, "Tie::IxHash", @fieldspecs;
my @names = keys %hash;
print "@names\n";
--------------------------------------
... or alternatively, if you don't want to use a hash, just extract the
array entries with even indices:
my @names = @fieldspecs[grep {$_ % 2 == 0} 0..$#fieldspecs];
print "@names\n";
HTH
--
Brian Raven
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