Denis questions

• hashmap for 2d(3d) coordinates (i.e. vector of doubles)?
• gfortran and random numbers
• Ambiguous reference and namespace (clash of definitions from the two external libraries)
• Can one define functions which operate on input data
• revert to previous configuration from command-line?
• Undefined symbol “toupper” in MacPorts GCC 4.7 OS-X Mavericks 10.9 C11
• how to add all currently untracked files/folders to git ignore?

Denis answers