02-07-2011
Hi yifangt,
No problems. chomp by the way operates on the default input ($_), so you can just specify chomp instead of chomp $_
The computation will take a while as you pointed out. I think it might be worth fixing up the first file so that everything is systematic e.g. having a standardised assembly notation, so you don't need to use a regular expression. Once that is fixed up, you can just use a hash to see if the key exists.
As for your second approach of deleting elements in the hash, look up the delete() function.
Good luck and happy coding!
Dave
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