Re: [FWP] Closest hash value

[Ronald J Kimball <rjk@linguist.dartmouth.edu>]

On Mon, Jul 19, 1999 at 09:31:51AM -0700, Larry Rosler wrote:
> > FD> You can get the "first" key with
> > 
> > FD> ($best) = each %h;
> > 
> > I know, but I'm not sure if that is optimized. It may cause all
> > 1_000_000 keys to be copied to the stack and then the first item
> > removed.
> > 
> > Anyone know for sure?
> 
> You have it backwards.  'for keys %h' creates a list of all the keys.
> 'each %h' returns one key-value pair, and stores the value of an
> iterator for succeeding calls.

Also, in a scalar context each() returns just the key, so the parens are
unnecessary.

Ronald

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