CR-TEKnologies programming

programming:c-cpp-performance

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:40:59+00:00

Performance in C/C++ Inline and macros Inlining short functions which are often called is very important for performance. Macros In C you can use macros : #define sqr(x) (x)*(x) But be careful, macros are very dangerous. For example parenthesis around

programming:cpp-style-tips

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:41:00+00:00

C++ style tips Modular architecture It is a very good thing to make a modular architecture. It permits creating several implementation for one functionnality (several ways to do it), and to easily switch from one to the other, or change a part of the program.

programming:debug

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:41:00+00:00

Debugging If you look directly at gcc output, you should install ColorGCC which displays errors in red and warning in yellow. Segmentation Faults The crash occurs where the error is It's the simpler case, which fortunately happens (null pointers, etc).

programming:howtos-tips

Anonymous (anonymous@undisclosed.example.com) — 2014-04-16T18:07:04+00:00

Howtos and Tips System For details on functions search in the man page (man or man -a if there is also a unix command with same name), or search the web. Catching signals => C and C++. You can catch ctrl-c or other signals, for example to clean up things before to quit.

programming:improve-your-cpp

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:40:59+00:00

This page is based on the excellent books of Scott Meyers : Effective C++ (50 specific ways to improve your programs and designs) and More effective C++ (35 new ways to improve your programs and designs). Effective C++ Shifting from C to C++ Item 1 : Use const and inline instead of #define

programming:instruction-timings

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:41:00+00:00

Instruction timings Here are some results of timings I've done of several instructions in C/C++, to compare several ways to do one thing. Proceeding FIXME Summary of results Depending on machines, floating point operations can be a lot slower than integer operations, or as fast, or even faster.

programming:latex

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:40:58+00:00

Latex Use latex ! Software For Windows I recommend using MikTeX distribution, and TeXnicCenter which is an excellent latex editor (keyboard shortcuts etc). With Linux I use TeTex distribution, and a normal text editor (Scite or Kate) or Kile which is a good latex editor (integrated compilation).

programming:makefiles

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:41:00+00:00

Makefiles Makefiles are very useful to automate compilation of multi-file projects in c/c++ with Linux. Syntax * variables: = # init $() # get content * targets: :

programming:ruby

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:41:00+00:00

Ruby Memento require 'jafar/module' load 'script-file.rb'

programming:stl

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:41:00+00:00

STL Erasing elements in a loop Map Erasing an element does not invalidate other iterators. bool erase_i; for(std::map::iterator i = myMap.begin(); i != myMap.end(); erase_i ? myMap.erase(i++) : ++i) { erase_i = false; ... if (want_erase) erase_i = true; ... }

programming:visual-studio

Anonymous (anonymous@undisclosed.example.com) — 2013-09-19T16:41:00+00:00

Visual Studio tips Useful features for debugging You probably already know classical features such as step-by-step execution (Step Into or Step Over to enter or not in functions) with breakpoints (conditions, count, disabling etc), Watch window, etc.