bigO6377 questions

• KDB: Select rows corresponding to two updated columns
• KDB: Union of time intervals
• KDB: user-defined aggregation function on tables
• KDB Excluding rows that have nulls
• KDB: apply dyadic function across two lists
• KDB selecting first row from each group
• Java: Array of first n integers
• R count function calls
• Pandas: Melting columns containing tuples
• KDB concatenating strings inside select/exec statements

bigO6377 answers