Juerd asked:
2+ args: interpolate specified operator
1 arg: return that arg
0 args: fail (i.e. thrown or unthrown exception depending on use fatal)
Following this logic, does join(" ", @foo) with [EMAIL PROTECTED] being 0 fail too?
No. It returns empty string. You could think of C<join> as being implemented:
sub join (Str $sep, [EMAIL PROTECTED]) { reduce { $^a ~ $sep ~ $^b } "",
@list }
Just as C<sum> is probably implemented:
sub sum ([EMAIL PROTECTED]) { [+] 0, @list }
I dislike this, and would prefer [op] with no elements to simply return
whatever () returns: an empty list in list context, undef in scalar
context.
I'd have assumed that "empty list in list context, undef in scalar
context" *is* what C<fail> returns when C<use fatal> isn't in effect.
Damian
