Re^2: Something eq hashref key

On a side note, it's a pity we can't use exists on hash slices ...

  DB<9> exists @h{"a","z"}
exists argument is not a HASH or ARRAY element or a subroutine at (eva
+l 18)...
[download]

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery
FootballPerl is like chess, only without the dice}

Comment on Re^2: Something eq hashref key Download Code

Replies are listed 'Best First'.
Re^3: Something eq hashref key by hdb (Monsignor) on Mar 25, 2019 at 14:17 UTC
In a recent thread it was shown that hash slices are not faster than maps, `exists` on hash slices is not needed. `sub slex { my $h = shift; return map { exists $h->{$_} \|\| 0 } @_ } my %h = map { $_ => 1 } 'a'..'t'; my @bool = slex \%h, 'a'..'z'; print "@bool\n";` [download]	[reply] [d/l] [select]
Re^4: Something eq hashref key by LanX (Saint) on Mar 25, 2019 at 14:59 UTC
You must be joking! (?) The benchmark was about non intuitive performance of constant lists. Slices are 5 times faster than maps in this example, and the overhead of join is still included Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply]