Hi Marcel, It’s an interesting problem. I would note that it’s much easier for us to read and process if you just put questions etc in the body of your email rather than as an attachment.
To answer your questions: a. How do I use inline::Cpp to call the CppAdaptive() function, without having to re-compile each time the script runs? (There was something mentioned about modules in the Inline:Cpp documentation, but I am new to perl as well as inline::cpp, so very practical advice would be much appreciated!) If you write your program as a simple script, to be run repeatedly by the same user, this “just works” – the Inline::C family cache the precompiled C and then DLL in a directory called “_Inline”. If you wanted to make an installable module, you would want to look at the very clever “Inline::Module”. b. On a Linux machine, how do I figure out where to place the non-standard C++ libraries, e.g. dlib/matrix in my case? (My survey software uploads all survey files, including Perl scripts, automatically.. but it does not automatically include user-written C++ modules) This depends on whether dlib/matrix is part of the survey software, in which case your Perl environment may just be able to find the library without further effort, or possibly with a configuration option. Generally you will need to supply extra configuration info to the Inline framework. More information is available at https://metacpan.org/pod/Inline::C::Cookbook – while this is for Inline::C, it will generally be applicable to Inline::CPP. Best regards, Ed From: M.F. Jonker<mailto:m.jon...@bmg.eur.nl> Sent: Saturday, May 27, 2017 3:55 PM To: inline@perl.org<mailto:inline@perl.org> Subject: Inline:Cpp to speed up adaptive questionnaire Dear all, After a kind recommendation by David Oswald, I'm emailing the inline community with a few questions about a specific Inline:Cpp implementation. The background of my questions is that I'm working on an academic project in which we want to adaptively create survey questions based on respondents' previous answers (that is, similar to an IQ-test, we don't want to ask simple questions to people who answered all previous questions correctly, and vise versa). Our survey system, which is hosted on a linux server, allows Perl-scripts to be run before each new question, yet the computationally intensive adaptive calculations crucially depend on pre-compiled C++ code for computational performance. Having read throught the inline::CPP documentation, I hoped that I could ask you a few short questions. I've placed them in the attached pdf and REALLY hope you can point me in the right direction! Many thanks, Dr. Marcel Jonker Erasmus University Rotterdam, The Netherlands
