John Doe questions

• Interchanging two substrings in a pandas string column
• PySpark UDF optimization challenge using a dictionary with regex's (Scala?)
• Delete row if any column contains one of the keywords
• Physical disk size not correct (IoCtlDiskGetDriveGeometry)
• Bash script log file rotation
• SQL query to find duplicates
• Remove start of new track from end of audio file
• How to exclude records with certain values in sql
• Count rows per hour in SQL Server with full date-time value as result
• Custom format for time command

John Doe answers