Re: Slicing an array variable with a -1 or any negative number doesn't work

Slicing with negative numbers does work. What doesn't however is 0..-1, as the .. operator only counts up. So (0..-1) is an empty list.

@{$row}[0,-1] will work. Or if you want a list of negative number, you can make one with map: @{$row}[map -$_, 0..2]

Edit: oh I thought you wanted 0..-2 to mean (0, -1, -2), but maybe hippo's interpretation is what you wanted: from the first element to the one before the last. In which case you have to use $#{$row}, the index of the last element as proposed by hippo

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Re^2: Slicing an array variable with a -1 or any negative number doesn't work by igoryonya (Pilgrim) on Nov 29, 2017 at 11:29 UTC
Ok, I got it. -1 or other -x (negative numbers) in slices, can only work with commas, but not with .. I see. Thank You.	[reply]
Re^3: Slicing an array variable with a -1 or any negative number doesn't work by shmem (Chancellor) on Nov 29, 2017 at 12:47 UTC
-1 or other -x (negative numbers) in slices, can only work with commas, but not with .. Nope. The point is that ".." counts up. These work: `@letters = ('a'..'z'); say for @letters[-5..-1]; say for @letters[reverse(-1..0)];` [download] perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'	[reply] [d/l]