Re^2: How to get the index of smallest whole number in an array?

The extra maps could be dispensed with I think.

johngg@abouriou ~/perl/Monks $ perl -Mstrict -Mwarnings -E '
my @arr    = ( 3, 4, 71, 1, -598, -100203 );
say for (
   sort { $arr[ $a ] <=> $arr[ $b ] }
   grep { $arr[ $_ ] >= 0 }
   0 .. $#arr
   )[ 0 ];'
3
[download]

Cheers,

JohnGG

Comment on Re^2: How to get the index of smallest whole number in an array? Download Code

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Re^3: How to get the index of smallest whole number in an array? by corenth (Monk) on Jul 02, 2018 at 18:07 UTC
I love reading through answers to even "simple" questions because I get to see new ways to solve problems and new syntax. This code is a prime example. Embedding code in a for loop like this is something I've never even thought of, but it makes sense that you can do that. But, what's with the `[ 0 ]` at the end? `my @arr = ( 3, 4, 71, 1, -598, -100203 ); say for ( sort { $arr[ $a ] <=> $arr[ $b ] } grep { $arr[ $_ ] >= 0 } 0 .. $#arr )[ 0 ]; # okay. what's with the [ 0 ] ??????` [download] I really want to know! $state{tired}?sleep(40):eat($food);	[reply] [d/l] [select]
Re^4: How to get the index of smallest whole number in an array? by AnomalousMonk (Archbishop) on Jul 02, 2018 at 19:52 UTC
... what's with the `[ 0 ]` at the end? If you liked that, take another look at kcott's `( ... )[0][0]` approach. That said, it's still not an O(n) solution and therefore not, in general, and all things being equal, to be preferred IMHO. Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re^4: How to get the index of smallest whole number in an array? by BrowserUk (Patriarch) on Jul 02, 2018 at 19:07 UTC
Update:Corrected ordering. Thanks to AnomalousMonk The for is unnecessary. This is equivalent:`say ( ... )[0]`. The contents of the parens creates an order list smallest to largest; the `[0]` selects the first element of that list. With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday' Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". The enemy of (IT) success is complexity. In the absence of evidence, opinion is indistinguishable from prejudice. Suck that fhit	[reply] [d/l] [select]
Re^5: How to get the index of smallest whole number in an array? by corenth (Monk) on Jul 02, 2018 at 20:35 UTC
Thanks for the explanation. I'll be playing with the new (for me) syntax :) $state{tired}?sleep(40):eat($food);	[reply] [d/l]


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