Re^2: re-initialize the hash

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Re^3: re-initialize the hash by jethro (Monsignor) on Apr 01, 2010 at 08:56 UTC
Yes, but unneccessarily complicated. Since you can assign a hash to an array and it will do the sensible thing, your code can be shortened to `use strict; use warnings; use Data::Dumper; my @array=('a',0,'b',0,'c',0); my %hash=('a'=>1 , 'b' =>2 , 'c'=>3,); %hash=@array; print Dumper \%hash;` [download] Your version has the advantage that if some of the keys should change, you still would reset them to 0. If you want to reset all values to 0 you don't need the array anymore: `@hash{keys %hash}=(0) x scalar(keys %hash);` [download] CORRECTION:Forgot () around the 0. And as cdarke pointed out to me the scalar is not needed as it is already in scalar context. But I tend to play safe with these things instead of trusting my memory	[reply] [d/l] [select]
Re^4: re-initialize the hash by cdarke (Prior) on Apr 01, 2010 at 09:19 UTC
Yes, but unneccessarily complicated Using the joy of x, your code can be shortened to: `use strict; use warnings; use Data::Dumper; my %hash=('a'=>1 , 'b' =>2 , 'c'=>3,); my @keys = keys %hash; @hash{@keys} = (0) x @keys; print Dumper \%hash;` [download] Update:Note the parentheses around the zero. Without them you just get a string of zeros and the other values are undef. Also, you don't need scalar because the RHS of x is already in scalar context.	[reply] [d/l]
Re^4: re-initialize the hash by vennila (Novice) on Apr 01, 2010 at 10:09 UTC
Did you check that one. `@hash{keys %hash}=0 x scalar(keys %hash);` [download] I gave me the following output as , `$VAR1 = { 'c' => '000', 'a' => undef, 'b' => undef };` [download] I want all the values of hash to '0'.	[reply] [d/l] [select]