>well splice also says
> The following equivalences hold
> ...
> shift(@a)     splice(@a,0,1)

It would appear shift is doing something like this:

  DB<232> x $x=4; while( ($y)= ( $u = splice( @t,0,1 ))){ last unless 
+$x--; print ":$_: " }

 :: :: :: ::  empty array

[download]

which would make the equivalence:

          shift(@a)   ===   ( $t = splice( @a,0,1 ) )

[download]

In reply to Re^3: shift on empty array in list context broken by Don Coyote
in thread shift on empty array in list context broken by LanX

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