From: Richard Lyman <rich@...>
Date: 2002-09-22T07:20:26+09:00
Subject: Re: select and select

What if the 'pick' method took an array as the first parameter, and a string
as the second parameter ?

The second parameter being optional that defaulted to the 'logical'
choice... index for arrays, key for hashes...

The second parameter being a definition of how the value supplied would
match the object where the method was applied?
(wow - that almost rhymed! :-) )

So::

h = {
    "one" => 1,
    "two" => 2,
    "different" => 2,
    "three" => 3,
    "theKeyForTwo" => "two",
    "anotherKeyForTwo" => "two",
    3 => "three"
}
a = [1,2,2,3,2,4,5]

valuesToPick = [ 2 ]
    a.pick(valuesToPick)    # => 2
    a.pick(valuesToPick)    # => 2

valuesToPick = [ "two" ]
    h.pick(valuesToPick)    # => 2
    h.pick(valuesToPick, "value")    # => "theKeyForTwo", "anotherKeyForTwo"

valuesToPick= [ "two", 3 ]
    h.pick(valuesToPick)    # => 2, "three"

valuesToPick= [ 2, "three" ]
    h.pick(valuesToPick, "value")    # => "two", "different"

-Rich


----- Original Message -----
From: <dblack@candle.superlink.net>
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
Sent: Saturday, September 21, 2002 9:43 AM
Subject: Re: select and select


> Hi --
>
> On Sun, 22 Sep 2002, Dave Thomas wrote:
>
> > "Richard Lyman" <rich@lithinos.com> writes:
> >
> > > What about a 'pick_as' option for the hash?
> >
> > Perhaps pick_using_xxxx, with straight 'pick' as an alias for
> > pick_using_key
>
> Or maybe _by_ instead of _using_ ?  (for brevity, also to my ear it's
> a slightly better fit).
>
>
> David
>
> --
> David Alan Black                      | Register for RubyConf 2002!
> home: dblack@candle.superlink.net     | November 1-3
> work: blackdav@shu.edu                | Seattle, WA, USA
> Web:  http://pirate.shu.edu/~blackdav | http://www.rubyconf.com
>