Check if a string is blank or doesn't exist in Scala

Question

I have an Option[String].

I want to check if there is a string exists and if it\'s exists its not blank.

def isBlank( input : Option[Strin         


        

Answer 1

All proposed solutions will crash with NullPointerException if you pass:

val str : Option[String] = Some(null). 

Therefore null-check is a must:

def isBlank(input: Option[String]): Boolean = 
  input.filterNot(s => s == null || s.trim.isEmpty).isEmpty