How to get value from Scala map:

How to get value from Scala map:

How to get value from Scala map:

How to get value from Scala map:

I want to read a csv which has one string and one INT columns ( just two of them ) . I want to pass a string variable to it , match it with first col and return value from second INT col . By default if no key matches and it returns a dummy value .

I have a list of IDs that I want to find in my parquet files. For each of the IDs I do have an idea in which files they could be present i.e. I would have a mapping where I have
ID1 -> file1, file2
ID2 -> file2, file5
ID -> file3, file4 and so on…

What would be best way in spark scala to do such a task. I thought of plenty ways.

I have a lazy val defined in my code studentDataReader which eventually reads data from an S3 path. My understanding is that even if I call this multiple times, it should call S3 once only.

I’m trying to write a custom UDAF/Aggregator in Scala Spark 3.3.x or above to get the concatenated hash of a hash column ordered by an id column.

I am attempting to drop a column using the drop function. But the column remains after the drop. The problem is evident in the following code:

In my spark app I use many temp views to read datasets and then use it in huge sql expression, like that: