I would like to sort a hash not in any of the ways I have seen in tutorials (therefore I am open to advice on rethinking the problem too). I need to sort these keys, in this order:
sort() on these strings will obviously return: start, step, stop, without my own sorting function. I have read japhy's Resorting to Sorting article and have attempted to apply some of those approaches, but I need a hand.
use strict;
use warnings;
use diagnostics;
my @aoh;
push @aoh, {
"start" => .4,
"stop" => .6,
"step" => .1
};
push @aoh, {
"start" => .3,
"stop" => .5,
"step" => .1
};
push @aoh, {
"start" => .0,
"stop" => .2,
"step" => .1
};
push @aoh, {
"start" => .5,
"stop" => .7,
"step" => .1
};
my $aoh = \@aoh;
for my $point ( @{$aoh}) {
#for my $type ( sort keys %$point ) {
for my $type ( sort by_pref keys %$point ) {
print "$type\t";
}
print "\n";
}
sub by_pref {
$a cmp $b;
#advice?
}
P.S. I am not interested in forcing the insertion order using Tie::IxHash for a few different reasons.