Morteza R questions

• finding frequencies of pair items in a list of pairs
• Using range in regex for Arabic letters
• union and difference of sets in Clojure
• Why does Go have several different integer types?
• Pattern matching on function parameters in Python
• How to parse a DOT file in Python
• Graphviz's executables are not found (Python 3.4)
• Error: struct Type is not an expression

Morteza R answers