First, what mtmcc said.

Second, a quote from the illustrious prophet: Doing linear scans over an associative array is like trying to club someone to death with a loaded Uzi. -- TimToady

You should put your keys into a hash, yes, but then just iterate over your array. The array values are exactly what you need to access the hash values. So it might look like: 

my %id = (bananas => 456,
          oranges =>  23,
          peaches => 897236,
          kiwis   => 3726,
         );
my @replaces = ('kiwis','oranges','bananas','bananas');
for my $i (0 .. $#replaces) {
    $replaces[$i] = $id{$replaces[$i]};
}

[download]
If I were going to actually write this, I'd take advantage of the fact that the loop iterator for Foreach Loops is an lvalue for the array element ($_ = $id{$_} for @replaces;), but that might be a little to magical for your taste given your familiarity with the language.

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

In reply to Re: using hashes by kennethk
in thread iterating hash keys? by R56

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