Re: RFC 196 (v1) More direct syntax for hashes

[John Porter]

> More direct syntax for hashes
> 
>   Maintainer: Nathan Torkington <[EMAIL PROTECTED]>
>   Date: 5 Sep 2000
>   Mailing List: [EMAIL PROTECTED]
>   Version: 1
>   Number: 196

Nat, I was thinking of writing an RFC on a related issue...
but it could piggy-back on this one (196) if you like the idea.

To wit: assignment to C<keys(%hash)> changes the hash's set
of keys so as to contain only the (key-ized) values in the RHS.
Iow,

        keys %hash = @things;

is defined as being equivalent to

        @hash{ @things } = ();

This is to support hash-based set operations in a more
natural way, i.e.

        keys %hash = grep { exists $a{$_} } keys %b;


-- 
John Porter

        We're building the house of the future together.