Prompt Techniques

Specific Prompts

Scala Prompts

1. Incremental Id assignment
   1. suppose I have a rdd called edgeDF which has src_id, dst_id columns. Now I want to turn srd_id and dst_id into a single column called vertex_id. Each vertex_id is unique and assign a new column called id with incremental number. Finally, I want to assign the id column to src_id and dst_id in the original edgeDF. please write the scala program