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Re: How to sort output?

by FunkyMonk (Canon)
on Jul 22, 2007 at 07:25 UTC ( #628094=note: print w/replies, xml ) Need Help??


in reply to How to sort output?

(Oh yea, and the "if" that's checking on the unlink to get rid of the file isn't working, either - the file unlinks fine but I always get the message. *grin*)
Usually, if a Perl feature isn't working as I expect, my first port of call will be Perl's extensive documentation. Try typing perldoc -f unlink in your shell, or from a browser here.

From unlink:

Deletes a list of files. Returns the number of files successfully deleted

Replies are listed 'Best First'.
Re^2: How to sort output?
by dguntner (Novice) on Jul 22, 2007 at 08:08 UTC
    Oh, foo. I totally read the example (that I found in an online tutorial site) backwards. Oops. :-) Thanks for straightening me out on that, it's working now (well, it worked before - it's just not giving me a false failure message anymore *grin*).

    --Dave

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[tobyink]: Why are you returning $_ n your grep block? You should return a boolean.
[tobyink]: *in your grep block
[tobyink]: You can use grep { $_ =~ /.*$in.*/; } @my_modules but why not stick to grep(/.*$in.*/, @my_modules)? (The latter is faster.)
[shmem]: Lady_Aleena, in the first example grep evaluates the result from grep and if true, returns $_. In the second, it always returns $_
[shmem]: ..the result from the pattern match
[Lady_Aleena]: tobyink, I did after I failed to get the BLOCK to work. I can't seem to get my brain around grep BLOCK, though I'm okay with grep EXPR.
[shmem]: so in the second example grep returns all true elements of the list passed
[Lady_Aleena]: Okay, so grep BLOCK is not like map BLOCK where something might need to be returned at the end.
[tobyink]: grep { $_ =~ /.*$in.*/; } @my_modules should work just fine. The problem is that you were adding on ;$_ at the end of the block. Why were you doing that?
[Lady_Aleena]: tobyink, I was thinking map.

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