in reply to Re^8: Syntax for casting map to a hash or an array
in thread Syntax for casting map to a hash or an array
Yes, these two are exactly the same, except for one gratitous reference-dereference round trip.
If you dereference a reference and take a reference to the dereferenced reference, this reference will be the same as the original reference.
#!/usr/bin/perl -l $h = {map { $_ => 'fish' } qw(one two red blue)}; print $h; print \%{$h}; print \%{\%{$h}}; print \%{\%{\%{$h}}}; print \%{\%{\%{\%{$h}}}}; print \%{\%{\%{\%{\%{$h}}}}}; print \%{\%{\%{\%{\%{\%{$h}}}}}}; print \%{\%{\%{\%{\%{\%{\%{$h}}}}}}}; print \%{\%{\%{\%{\%{\%{\%{\%{$h}}}}}}}}; __END__ HASH(0x17ea548) HASH(0x17ea548) HASH(0x17ea548) HASH(0x17ea548) HASH(0x17ea548) HASH(0x17ea548) HASH(0x17ea548) HASH(0x17ea548) HASH(0x17ea548)
Sorry for so may ref-deref, couldn't stop... %-)
perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'
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Re^10: Syntax for casting map to a hash or an array
by stevieb (Canon) on Apr 05, 2017 at 19:30 UTC |
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Seekers of Perl Wisdom