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Re^2: Rewrite Program Using Arrays

by perl.j (Pilgrim)
on Mar 25, 2012 at 20:38 UTC ( #961541=note: print w/replies, xml ) Need Help??

in reply to Re: Rewrite Program Using Arrays
in thread Rewrite Program Using Arrays

Thanks for the advice, but I just want to clear this up. I am not comfortable using the push and pop functions, so this is also going to be a learning experience. I understand that there are a lot of things I can do to speed the process, but I want to see what this will do still... The problem is, I don't know how to do it.

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Re^3: Rewrite Program Using Arrays
by aaron_baugher (Curate) on Mar 26, 2012 at 05:21 UTC

    There is no use for push/pop here, though. This is a pretty straightforward problem: counting the occurrences of words in a file. That means putting the words in a hash as the keys and incrementing the value when a word is seen. That's what you've done, so you're already using the best algorithm. You can gain some speed by cutting out any unnecessary assignments, as I showed with the benchmarks in my other post; but you certainly won't gain anything by using a less straightforward algorithm or by shuffling your words around through extra arrays. There really aren't "a lot of things you can do to speed the process." Building a hash and sorting on the values is as fast as it's gonna get, unless you want to rewrite it in C.

    Aaron B.
    My Woefully Neglected Blog, where I occasionally mention Perl.

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