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in reply to Get even postion elements in an array

@output = grep $|--, @input;

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using some magic of $| for the flipflop.

But unless you use it for a real oneliner, use some less obscure formulation of the principal shown in previous replies. ;-)

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Re^2: Get even postion elements in an array
by Anonymous Monk on Oct 20, 2016 at 01:25 UTC 
    $ perl -e 'my @a=(2, 3, 4, 5, 1, 7); print ("==> ", (map{$_ % 2 ? (): 
+" $a[$_]"} 0..$#a), "\n");'
==>  2 4 1

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[d/l]

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