2000-08-28-18:47:06 Tom Christiansen:
It strikes me as a bit reminiscent of (one reason) why Larry
didn't make a+b work on strings, since then while with numbers,
a+b and b+a would be the same, with strings they would not be, and
we have these rather deeply held convictions about such
On Tue, 05 Sep 2000 19:08:18 -0600, Tom Christiansen wrote:
exists (sometimes causes autovivification, which affects Ckeys)
That's not technically accurate--exists never causes autovivification.
print exists $hash{foo}{bar}{baz};
use Data::Dumper;
print Dumper
print keys %hash, "\n";
exists $hash{key}{subkey};
print keys %hash, "\n";
Or did that get fixed when I wasn't looking?
No, the - operator has not been changed to do lazy evaluation.
That's not required. All that is necessary is for Cexists nodes
in the op
Why can't we just apply the same warnings on hashes as we do on
variables in Perl? Maybe a new lexical pragma:
no autoviv; # any autovivification carps (not just
# hashes)
no autoviv 'HASH'; # no new
On Tue, 05 Sep 2000 19:08:18 -0600, Tom Christiansen wrote:
exists (sometimes causes autovivification, which affects Ckeys)
That's not technically accurate--exists never causes autovivification.
print exists $hash{foo}{bar}{baz};
use Data::Dumper;
print Dumper
