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[REBOL] Re: Puzzle with FIND and SELECT

From: joel:neely:fedex at: 10-Feb-2003 10:56

Hi, Ladislav, Ladislav Mecir wrote:
> ... > > - Why do we need SAME? at all? One use is to distinguish mutable > > values so that one can determine in advance whether a change via > > one "access path" will affect what is visible via another? > > SAME? is not useful for this purpose. The reason is as follows: > you can find two values that clearly aren't the same, like e.g. > > a: [1 2] > b: next a >
I didn't mean that SAME? was the whole answer, but that it can be used to obtain the answer. To use your example:
>> a: [1 2] == [1 2] >> b: next a == [2]
as you point out...
>> same? a b == false
>> same? head a head b == true
which is all I meant. -jn- -- ---------------------------------------------------------------------- Joel Neely joelDOTneelyATfedexDOTcom 901-263-4446 Atlanta, Ga. - Scientists at the Centers for Disease Control today confirmed that hoof-and-mouth disease cannot be spread by Microsoft's Outlook email application, believed to be the first time the program has ever failed to propagate a major virus.