Re^3: Case where '( shift @_ )[ 0, 0 ]' returns only one value?

Ok. I'll do some installs of other versions on Linux and Windows and try to get to the version where it's borked while I finish my work day. On my Windows system I sometimes develop on, with 5.28.1, I get the aa as well:

c:\repos\berrybrew>perl -le "@_ = qw( a b c ); print( ( shift @_ )[ 0,
+ 0 ] );"
aa

c:\repos\berrybrew>perl -le "@_ = qw( a b c ); @A = ( shift @_ )[ 0, 0
+ ]; print @A"
aa

c:\repos\berrybrew>perl -v

This is perl 5, version 28, subversion 1 (v5.28.1) built for MSWin32-x
+64-multi-thread
[download]

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Re^4: Case where '( shift @_ )[ 0, 0 ]' returns only one value? by AnomalousMonk (Archbishop) on Jan 14, 2019 at 21:41 UTC
This behavior appears somewhere between versions 5.12.3 and 5.14.4, but a quick scan of the deltas (update: between these versions) shows no justification for it. (Update: All code run under Windows 7.) `c:\@Work\Perl\monks>perl -wMstrict -le "print 'perl version: ', $]; ;; use Data::Dumper; ;; @_ = qw( a b c ); print( ( shift @_ )[ 0, 0, 0 ] ); ;; @_ = qw( a b c ); my @A = ( shift @_ )[ 0, 0, 0 ]; print Dumper \@A; ;; @A = ( 'x', 'y', 'z' )[ 0, 0, 0 ]; print Dumper \@A; " perl version: 5.012003 aaa $VAR1 = [ 'a', 'a', 'a' ]; $VAR1 = [ 'x', 'x', 'x' ]; perl version: 5.014004 aaa $VAR1 = [ 'a', undef, undef ]; $VAR1 = [ 'x', 'x', 'x' ];` [download] Version 5.14 is the latest I can access ATM. Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re^5: Case where '( shift @_ )[ 0, 0 ]' returns only one value? by stevieb (Canon) on Jan 14, 2019 at 21:49 UTC
Nice catch AnomalousMonk, but it still breaks for me on 5.18 per OP's statement above: `c:\repos\berrybrew>perl -le "@_ = qw( a b c ); @A = ( shift @_ )[ 0, 0 + ]; print @A" a c:\repos\berrybrew>perl -v This is perl 5, version 18, subversion 4 (v5.18.4) built for MSWin32-x +64-multi-thread` [download] I'm having some issues (per CB mention) with fetching versions on my Unix machines with `perlbrew available`, so all I can test on is Windows currently.	[reply] [d/l] [select]