This is still broken.
Inside the sort {}, $a will be one of the list inside $foo, and $b another,
so that's how you get the
No such pseudo-hash field "HASH(0x10a57c)" at ./listref line 22.
error, because you have coerced the $foo->{$a} to a pseudo-hash reference
when it is really an array reference. The error occurs because
If $foo were really a pseudo-hash, it should have a hash as the first element,
(which it does) which contains a field to match $a which $foo doesn't.
Within the sort command, $a is already dereferenced, so you must use
my @bar = sort {$a->{blah} cmp $b->{blah} } @$foo;
Where the names of the fields being compared are the same ('blah' in this case).
my $foo = [ {blah=>5,d=>1},
{blah=>4,d=>2},
{blah=>3,d=>3},
{blah=>2,d=>4},
{blah=>1,d=>5}];
my @bar = sort {$a->{blah} cmp $b->{blah} } @$foo;
print join(',',map {$_->{blah}} @bar), $/;
worked for me.
P.S. If this had been an array of arrays, the message is more clear :
my $foo = [ [5,1],
[4,2],
[3,3],
[2,4],
[1,5]];
my @bar = sort {$foo->{$a} cmp $foo->{$a} } @$foo;
# should be my @bar = sort {$a[0] cmp $b[0]} @$foo;
generates
Can't coerce array into hash at ./listref line 33.
which is a bit more useful.
--
Brovnik | 