Thank you! Great explanation.
--------------------------------------------------------------
Mark Warrick
Phone: (714) 547-5386
Efax.com Fax: (801) 730-7289
Personal Email: [EMAIL PROTECTED]
Personal URL: http://www.warrick.net
Business Email: [EMAIL PROTECTED]
Business URL: http://www.fusioneers.com
ICQ: 346566
--------------------------------------------------------------
> -----Original Message-----
> From: Peter Theobald [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, November 07, 2000 2:17 PM
> To: CF-Talk
> Subject: RE: Is Cold Fusion a Typed Language?
>
>
> A strongly typed language requires you to declare the data type
> of all variables ahead of time. All functions return values that
> are of a specific type. All operators act on values of specific
> data types.
>
> For example, assume you have a function nth( list, n) that
> returns the nth value of a list where a list is a string with
> comma separated values. nth might be declared as follows:
> string nth( string list, integer n)
>
> It would be an error to pass anything but a string as the first
> argument. It would be an error to pass anything but an integer as
> the second argument. It would be an error to assign the results
> to anything but a string variable.
>
> string list = "10,20,30,40";
> string val;
> integer n=2;
> integer m;
>
> val = nth( list, n); ( val = the string "20")
> m = nth( list, n); (ERROR because nth returns a STRING not an integer)
> val = nth( list, "3") (ERROR because "3" is a string)
> val = nth( list, 3) (val = the string "30")
>
> If you need to get around these restrictions you need to
> explicitly convert the datatypes:
>
> m = convert( nth( list, 3), "integer")
> or
> m - (int) convert( nth( list, 3)) (this is how 'C' does it)
>
>
> The advantages of a strongly typed language are the
> compiler/run-time system can catch subtle errors because you are
> so explicit about what data types are being passed around.
> The disadvantage is it's a pain to have to declare everything
> ahead of time and to convert values all over the place.
>
> Most "typed languages" are not quite this strict and will do many
> automatic conversions for you.
>
>
> At 08:21 AM 11/7/00 -0800, Warrick, Mark wrote:
> >For the sake of us non-programmers could you explain what "typed
> language" means?
> >
> >---mark
> >
> >--------------------------------------------------------------
> >Mark Warrick
> >Phone: (714) 547-5386
> >Efax.com Fax: (801) 730-7289
> >Personal Email: [EMAIL PROTECTED]
> >Personal URL: http://www.warrick.net
> >Business Email: [EMAIL PROTECTED]
> >Business URL: http://www.fusioneers.com
> >ICQ: 346566
> >--------------------------------------------------------------
> >
> >
> >> -----Original Message-----
> >> From: Jeffry Houser [mailto:[EMAIL PROTECTED]]
> >> Sent: Tuesday, November 07, 2000 5:40 AM
> >> To: CF-Talk
> >> Subject: Is Cold Fusion a Typed Language?
> >>
> >>
> >>
> >> I've heard in quite a few places that ColdFusion is a typed language?
> >> However, it acts as an untyped language. Can anyone verify
> for me which
> >> one is actually true?
> >>
> >> You don't declare variables a type when you create them, and you
> >> can typically change a variable from a string to an integer without
> >> a second thought. I was told that ColdFusion handles all data
> >> conversion internally to take the burden off the user, but for
> >> efficiency's sake, it's best not to switch the type of a variable if
> >> you can avoid it.
> >>
> >> And if Cold Fusion is a typed language, what are the simple types?
> >> The standard string, integer, float, and boolean?
> >>
> >> --
> >> Jeff Houser
> >> AIM: Reboog711 | ICQ: 5246969 | Phone: 860-229-2781
> >> --
> >> DotComIt, LLC
> >> Computer Consultant specializing in database driven web data
> >> Lotus Notes/Domino, Cold Fusion
> >> --
> >> Half of the Alternative Folk Acoustic Duo called Far Cry Fly
> >> http://www.farcryfly.com
> >> http://www.mp3.com/FarCryFly
> >> --
> >> Does Everyone Think I'm a Cynical?
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> ------------------------------------------------------------------
> ---------
> Peter Theobald, Chief Technology Officer
> LiquidStreaming http://www.liquidstreaming.com
> [EMAIL PROTECTED]
> Phone 1.212.545.1232 x204 Fax 1.212.545.0938
>
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