Kowshik questions

• Making a Ruby string immutable
• Java compatible cksum function
• Check if one regex covers another regex
• Finding elementary intervals in overlapping intervals
• MySQL not using index for ORDER BY
• Why can I refer to a variable outside of an if/unless/case statement that never ran?
• Installing openssl in ruby / rbenv
• Right way to pass environment variables to exec shell command [duplicate]

Kowshik answers