Hi Monks, I want to merge a couple of files and sort the output. I have stored the files to be merged in separate lists and I want to add a number to each element of each list with map. The numbers are to be used later by 'sort' to put the lines in a particular order. Perhaps an example... 
@newsent     = map {if ($i == 0){$i + 1} elsif ($i % 10 == 0){$i += 10
+}; $i," ",$_} @testsent;
@newfillers    = map {$j % 2 == 0 && $j % 10 != 0;$j," ", $_} @fillers
+;
@newfoils     = map {unless ($k == 1){$k % 2 != 0 && $k % 5 != 0}; $k,
+" ",$_} @foils;
@newwords     = map {$l % 5 == 0; $l," ",$_} @words;

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Unfortunately, no number was put in the new list. I thought that I had to initialize a value for $i to $l, but when I do that the part of map that says which numbers should be added seems to be ignored. Here's my question(s): Do I have to initialize a value, and if so, where? Is map the best solution to my problem. Should I use a hash, and if so, why and how? best, Ruben van de Vijver

In reply to merging files using map by epistrophy

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