I have a dataframe containing two columns,one is data and the other column is character count in that data field.
Data Count
Hello 5
How 3
World 5
I want to change value of column data based on the value in count column. How can this be achieved? I tried this using an udf :
invalidrecords.withColumn("value",appendDelimiterError(invalidrecords("value"),invalidrecords("a_cnt")))
This seems to fail, is this the correct way to do it?