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[REBOL] Re: Problems with block of datatype!s

From: tim::johnsons-web::com at: 12-Sep-2001 11:10

On Wed, Sep 12, 2001 at 10:55:45AM -0700, Holger Kruse wrote:
> On Wed, Sep 12, 2001 at 09:40:34AM -0800, Tim Johnson wrote: > > I would like to be able to test a word for a > > match in a block whose members are datatypes. > > > > The example code doesn't do what I want it to do: > > >> types: [string! number!] > > == [string! number!] > > >> find types string! > > == none ; was hoping for [string! number!] > > >> types/1 = string! > > == false ; was hoping for 'true > > Just curious: what else do I need to do here? > > Change > types: [string! number!] > to > types: reduce [string! number!] > > The reason is: In your block, "string!" is an unevaluated > word (type word!), but in your call to 'find "string!" > gets evaluated and becomes the datatype! "string!". Words > are different from datatypes, so no match is found. > Reducing the block evaluates the words in it and converts > them to datatypes, allowing 'find to do what it should.
Thanks Holger
> This is not a bug btw.
I had no suspicion that it would be, I suspected that the answer would be in 'bind or 'reduce which are rebol terms that my feeble brain has yet to fully absorb. Also: Holger, if you are still on line, I need to post something that I wish to CC to you and Carl. A small piece of good news for Rebol ..... which might need your input. regards tim