Jens Wirth questions

Jens Wirth answers

• How can I call Vim from Python?
• Print name of the file in front of every line of file
• Get nth character of a string in Swift programming language
• How to write method to calculate average in Swift-playground
• What is the difference between sim operator and network operator
• Why can't I divide integers in swift?
• Swift subclassing - how to override Init()
• How do I check if a string contains another string in Swift?