BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  how do you do this in delphi?          BorlandTalk.com Forum Index -> Delphi ObjectPascal View previous topic :: View next topic   Author Message HanslH Guest Posted: Sat Jan 03, 2004 7:15 pm    Post subject: how do you do this in delphi? In clipper I gave users the oppotunity to set the high-norm value for a blood test as f.e. '60' (as a string) but also as '50 + 1.2*G', which would mean: 50 + 1.2 times body weight. I would substitute bodyweight for G through code and the rest would be handled by the 'macro' operator &. Give clipper &('50 + 1.2*40') and it will come with the proper value. Since macros aren't part of Delphi and I assume Delphi wants to be as much a solution to problems as the next language I was wondering how you would do this in Delphi? P.s. things can become as complicated as the dosage of a injection being expressed like 0.4 + 0.1*G + 0.22*G^0.7 but also as a 'simple' lineair weight dependency. Very curious. Back to top Skybuck Flying Guest Posted: Sat Jan 03, 2004 9:17 pm    Post subject: Re: how do you do this in delphi? Euhm so you put in a string ? which contains a formula ? Possibly things that come to mind: 1. Parse the string. 2. Use a scripting language. 3. Find a component or library that does what you want. 4. Try creating a special gui to input those things seperatly. Just my 5 cents, Skybuck. "HanslH" <NOSPAMhh_000001 (AT) xs4all (DOT) nl> wrote Quote: In clipper I gave users the oppotunity to set the high-norm value for a blood test as f.e. '60' (as a string) but also as '50 + 1.2*G', which would mean: 50 + 1.2 times body weight. I would substitute bodyweight for G through code and the rest would be handled by the 'macro' operator &. Give clipper &('50 + 1.2*40') and it will come with the proper value. Since macros aren't part of Delphi and I assume Delphi wants to be as much a solution to problems as the next language I was wondering how you would do this in Delphi? P.s. things can become as complicated as the dosage of a injection being expressed like 0.4 + 0.1*G + 0.22*G^0.7 but also as a 'simple' lineair weight dependency. Very curious. Back to top James Mauldin Guest Posted: Sat Jan 03, 2004 9:40 pm    Post subject: Re: how do you do this in delphi? "HanslH" <NOSPAMhh_000001 (AT) xs4all (DOT) nl> wrote Quote: In clipper I gave users the oppotunity to set the high-norm value for a blood test as f.e. '60' (as a string) but also as '50 + 1.2*G', which would mean: 50 + 1.2 times body weight. I would substitute bodyweight for G through code and the rest would be handled by the 'macro' operator &. Give clipper &('50 + 1.2*40') and it will come with the proper value. Since macros aren't part of Delphi and I assume Delphi wants to be as much a solution to problems as the next language I was wondering how you would do this in Delphi? P.s. things can become as complicated as the dosage of a injection being expressed like 0.4 + 0.1*G + 0.22*G^0.7 but also as a 'simple' lineair weight dependency. If you mean "does Delphi have a C-style 'eval' function?" the answer is no. However, I'm in the early stages of learning how to use windows script to do this. 1. Import and install Microsoft Script Control (msscript.ocx) 2. Drop the component onto the main form 3. In an appropriate place, add this code (assuming the G = 40 substitution) var d : Double; begin ScriptControl1.Language := 'VBScript'; d := ScriptControl1.Eval('0.4 + 0.1*40 + 0.22*40^0.7'); ShowMessageFmt('%.2f',[d]); end; Result is 7.31. Is that right? -- James Back to top Tony J Hopkinson Guest Posted: Sun Jan 04, 2004 1:15 pm    Post subject: Re: how do you do this in delphi? On Sat, 03 Jan 2004 20:15:16 +0100, HanslH <NOSPAMhh_000001 (AT) xs4all (DOT) nl> wrote: Quote: In clipper I gave users the oppotunity to set the high-norm value for a blood test as f.e. '60' (as a string) but also as '50 + 1.2*G', which would mean: 50 + 1.2 times body weight. I would substitute bodyweight for G through code and the rest would be handled by the 'macro' operator &. Give clipper &('50 + 1.2*40') and it will come with the proper value. Since macros aren't part of Delphi and I assume Delphi wants to be as much a solution to problems as the next language I was wondering how you would do this in Delphi? P.s. things can become as complicated as the dosage of a injection being expressed like 0.4 + 0.1*G + 0.22*G^0.7 but also as a 'simple' lineair weight dependency. Very curious. There's masses of delphi code for expression evaluators out there never mind string parsing, scripting engines. Because delphi (pascal really) is not an interpretive environment but a compilative (is that a word ?) one what you are decribing would not be a macro as it cannot be compiled. You need to compile in a tool that will interpret the input at run time Back to top HanslH Guest Posted: Fri Jan 09, 2004 7:19 am    Post subject: Re: how do you do this in delphi? Calcexpress from http://delphi.icm.edu.pl/newl/d30/f049_001.htm does exactly what I needed; small, subtle, easy and free. Now on to macro's with clipper compatible commands and codeblocks .. On Sat, 03 Jan 2004 20:15:16 +0100, HanslH <NOSPAMhh_000001 (AT) xs4all (DOT) nl> wrote: Quote: In clipper I gave users the oppotunity to set the high-norm value for a blood test as f.e. '60' (as a string) but also as '50 + 1.2*G', which would mean: 50 + 1.2 times body weight. I would substitute bodyweight for G through code and the rest would be handled by the 'macro' operator &. Give clipper &('50 + 1.2*40') and it will come with the proper value. Since macros aren't part of Delphi and I assume Delphi wants to be as much a solution to problems as the next language I was wondering how you would do this in Delphi? P.s. things can become as complicated as the dosage of a injection being expressed like 0.4 + 0.1*G + 0.22*G^0.7 but also as a 'simple' lineair weight dependency. Very curious. 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