On Tue, Dec 27, 2005 at 01:13:10PM -0500, Rob Kinyon wrote: : On 12/27/05, Larry Wall <[EMAIL PROTECTED]> wrote: : > On Tue, Dec 27, 2005 at 12:10:45AM -0500, Rob Kinyon wrote: : > : Creating an array whose positions are aliases for positions in another : > : array can be useful. How about : > : : > : my @s := @a[0,2,4] is alias; : > : : > : @a[2] = 3; # @s[1] == 3 : > : @s[1] = 4; # @a[2] == 4 : > : : > : The default slicing behavior would default to "is copy", to preserve : > : the current semantics. Does that sound reasonable? : > : > Hmm. Assignment is already adequate for copying semantics. And binding : > the individual elements can presumably be done by: : > : > my [EMAIL PROTECTED] := @a[0,2,4]; : : What's the difference between: : : my @s := @a[0,2,4]; : : and : : my [EMAIL PROTECTED] := @a[0,2,4]; : : ?
As with function parameter binding, the first would attempt to bind only the first argument, that is, @a[0]. The main difference between := and parameter binding is that := defaults to rw instead of readonly. Larry
