Igor questions

• Problems with setting JPanel's colour
• Multiline trimming
• Sorting a deck of cards by suit and then rank
• Why should I use floats?
• Understanding static in C#
• Problems with Prolog's DCG
• Multiple source files in Haskell
• Concatting a list of strings in Prolog
• Algebraic data type equivalent in C
• emacs keybinding to compile C file

Igor answers