Question 1. Explain What Are The Operating Systems Under Which Clipper Can Operate?
MSDOS and clones and emulators.
Question 2. Explain What Are The Features Of Clipper Vo?
There is no Clipper VO; CA Visual Objects is an object oriented Clipper wonderful-set that runs under Windows and creates Windows executables.
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Question 3. Tell Me How Is File Locking Handled In Clipper?
if flock()=.T. Then
Question 4. Tell Me What Is The Database On Which Clipper Is A Based?
Clipper is a method. This techniques used for statistics layout changing into other layout, due to the fact nobody can hack or misue it. So convert the text into different layout for transformation on the internet.
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Question five. Explain What Is The Format Used For Real Numbers By Clipper?
Clipper uses binary floating factor layout for Real Numbers that can bring about precision related errors.
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Question 6. How Easy Is Netlib To Use?
Most obligations can be done with one or two strains of code. For greater complex tasks (which include processing login scripts), we provide supply code "snippets" which you could encompass on your utility.
Question 7. Who Is Communication Horizons?
In a commercial enterprise in which organizations and merchandise reputedly come and pass each month, Communication Horizons has been a fixture on the PC software panorama on account that 1986. Their flagship product, NetLib, become introduced in 1986, and has won both "excellent of" or "honorable point out" within the DataBased Advisor Readers Choice Awards each year considering 1989.
RaSQL, brought in 1989, has almost single-handedly raised the attention within the "Xbase" network to the benefits of Btrieve. Between the two, Communication Horizons' merchandise were used by tens of thousands of developers international.
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Question 8. What Versions Of Clipper Does Netlib Support?
NetLib supports Clipper 87 through five.Three.
Question 9. Does Netlib Support Windows 95?
NetLib 6.5 will allow you to use FiveWin or Clip4Win to create Windows three.1 well matched products. These applications can run unchanged below Windows 95.
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Question 10. Is It Possible To Break Netlibs Encryption?
NetLib's SDE become designed to be a reasonably at ease scheme to keep unauthorized users and programmers from getting access to facts. It became not designed to foil the skilled, committed hacker. If you have got information of a really touchy nature that you consider sure humans are actively looking to compromise, you have to examine a very comfortable scheme consisting of "DES" or "PGP" encryption.
Question eleven. Why Do I Need Netlib?
If you are developing packages for use on a community it is able to substantially beautify the "appearance and sense", responsiveness and safety of your software. It can enhance your productiveness by means of making hard responsibilities less difficult and seemingly not possible tasks viable.
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Question 12. If I Use Netlib, Will I Find Many Other Users To Network With?
NetLib has been around on account that 1986, and has over 20,000 users world-wide. You will without difficulty discover other users who can be inclined to exchange their suggestions and hints.
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Question thirteen. What Is Netlib For Clipper?
NetLib is a multi-faceted networking library for CA-Clipper. While it makes a speciality of network capability it additionally has many functions which make it valuable even on a stand-alone device.
Question 14. Why Not Phenix, The Zelinka/otwinoski Libraries, Etc?
I'm penning this library to clear up my very own problems, and to assist CCP4 developers transition to OO programming. You must locate the first-class tool for the hassle you need to solve, and use that. If Clipper suits the assignment, then I am glad to provide advice on implementation and make changes which do not lose generality.
Having stated that, it's miles genuinely viable to apply CLipper in association with CCTBX.
Question 15. Why Do Not You Use Gnu Autoconf Or Scons For Building?
The brief solution is that if you get it from CCP4, it does. If you get it from me it would not, becuase autoconf is unreasonably complex and I actually have higher matters to fill my head with.
The long answer is that when Paul (who's an autoconf guru) and I set up autoconf for clipper it took us every week, and required enough specialist knowledge that I couldn't certainly keep it. By contrast, once I set it up with SCONS, it took me less than an afternoon and was without problems maintainable, but at that stage SCONS didn't deal with other systems thoroughly. So I distribute improvement versions of clipper with simple construct scripts which clearly paintings for me, CCP4 distribute launch versions with autoconf due to the fact they have got enough revel in to keep it, and PHENIX distribute it with SCONS because that is what they use. If you need an autoconf version, use the CCP4 release (granted its constantly a bit out of date).
Question sixteen. What Is The License For Clipper?
If you get it from here, the code is certified beneath the LGPL with a further clause taking into consideration the distribution of binaries without object files. If you get it from CCP4, it is certified underneath the CCP4 library license.
Question 17. Can I Use Fortran/c/python/visible Basic?
You can offer SWIG wrappers for the components of your application you want to get entry to.
Question 18. Why Use References Rather Than Pointers In The Public Api, Particularly For Arguments Which Are Modified?
The C++ offers the most precise declaration of the priciples:
No tips within the public API, besides while returning a pointer which might be null. The above reference also describes the trouble of wrong attitudes added over from C.
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Question 19. Why C++ Used In Clipper?
This is where I'm meant to inform you that C++ is a top notch language. It isn't always (at least now not for my functions). A appropriate programming language lets in you to assume inside the language of the problem, not the language of the laptop. In C++ you keep having to go back to implementational details, together with whether to use a pointer or a reference or a value, a derived elegance or a template. This is probably unavoidable if suitable overall performance goes to be executed.
But the principle cause is a lack of alternatives. Java is (usually) slow, and clumsy in places. Maybe Objective-C, Delphi, or even C# have solved some of those troubles, but they are less transportable and less big than C++.
Question 20. Do I Need Ccp4?
No. CCP4 is an non-compulsory dependency that's most effective needed if you need to get right of entry to CCP4 document codecs.
Question 21. What Does Clipper Stand For?
A clipper is a quick or prestigious ship.
CliPPer = C Plus Plus
cLIpper = LIbrary
clippER = ER, thats enough acronym for now.
Or in case you decide upon, "Cross-crystal Likelihood Phase Probability Estimation and Refinement, that's what I desire it is going to be used for.