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temp string manipulation :

P: 51
HI,

i'd like to use regexp replacement without changing variable value.
for example : in the following code i'd like to preseve the value of $key, but i need to change it's value in order to use it as an hash key. however, the hash key is only temporal and can be destroyed right after getting the hash.

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  1.  
  2. my $key   = "aaa.bbb.ccc"; 
  3. my $temp =~ s/\.ccc//; 
  4. print $hash{$temp}; 
  5.  
the question is whether i can perform the above code without using the $temp.

thanks,
Oct 1 '09 #1
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2 Replies


Expert
P: 70
I can understand why you would want to do such a thing,
but I can not think of a stright-forward way to avoid
a temporary variable. A temp variable isn't so bad
in your case.

I can, however, think up a couple of convoluted ways
to avoid a temp var. One way is to use split:

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  1. my $key = "aaa.bbb.ccc";
  2. print $hash{(split /\.ccc/, $key)[0]};
  3.  
I don't recommend this, since a temp var
is much less obscure, in my opinion.

I won't even show you my File::Basename solution :)
Oct 3 '09 #2

numberwhun
Expert Mod 2.5K+
P: 3,503
I have to agree with toolic. The temp variable is not at all a bad solution. Why are you so averse to it?

Regards,

Jeff
Oct 4 '09 #3

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