|Perl Monk, Perl Meditation|
Re^6: Using grep and glob to find directories containing file (list assignment)by LanX (Canon)
|on Feb 04, 2013 at 09:41 UTC||Need Help??|
> Lists don't return their length in scalar context
With "goatse" it's a list _assignment_ = which in scalar context returns the number of list elements assigned.
But this was a scalar assignment.
> my $x = ('a', 'b', 'c');
The LHS of the assignment operator decides about the context.
An example of scalar context of list context of assignment is
while ( ($v,$k) = each %h )
It will terminate as soon as each returns an empty list, not when the lists last element (here $k) is undef.
PS: you replied to yourself twice.
I think analyzing the op-tree helps understanding the mechanism
(don't blame me for Larry's decision to call a list assignment aassign)
You see assignment BINOP is like a function called with arguments (RHS,LHS) and RHS is evaluated according to LHS context and assigned to LHS. (thats decided a compile time)
The RHS of the first BINOP is the second BINOP, not a list.