Scala Sparks contains vs. does not contain

Question

I can filter - as shown below - tuples in RDD using "contains". But what about filtering RDD using no?

val rdd2 = rdd1.filter(x => x._1 contains ".") 

I can not find the syntax for this. Assuming this is possible and that I am not using DataFrame s. I cannot figure out how to do this with examples of regular expressions and / or filters.

Answer 1

This is simply negating the filter predicate contains :

 val rdd2 = rdd1.filter(x => !(x._1 contains "."))