setting variable values to zero

[stort]

i currently have a hash map that counts the number of word occurances (over multiple files) but cumulatively. so i need a way of resetting the value to zero

this line increments the counter when the word is found:
$keywords{$word}++ if (exists $keywords{$word});

i have tried:
$keywords{$word}=0;
but this did not work, can anybody tell me the code to affectively do what i am trying to do?

 

[KevinADC]

it should work, there must be another problem why the hash key is not getting reset to zero.

 

[InDenial]

hmmm just wandered over this post and read it and I might be wrong but.

If you set $keywords{$word}=0; it will never excist and will never increase cause $keywords{$words} = not true

if (!$keywords{$word}){$keywords{$word} = 1};
else { $keywords{$words}++};

with the above you can set $keywords{$words}=0;

InDenial

 

[KevinADC]

that's not correct InDenial but your thinking isn't too far off. The exists() function checks for the existence of the key, not it's return value:

my %hash =(
   foo => 0,
   bar => 1
);
	
print "Foo exists\n" if (exists($hash{'foo'}));
print "Bar exists\n" if (exists($hash{'bar'}));
print "Baz exists\n" if (exists($hash{'baz'}));