John Doe questions

• Error: Series' object has no attribute 'contains'"
• How to specify column position when adding new column to a csv file using PowerShell
• Convert a date string with different formatting's and month abbreviation in Dutch using to_date in PySpark
• Replace only last occurrence of column value in DataFrame
• Incomprehensible result of a comparison between a string and null value in PySpark
• BinaryReader read 4 bytes and don't get expected result
• 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)

John Doe answers