Scala: Fill the gaps in a List with last non-empty value

Question

I have a list like:

val arr = Array(\"a\", \"\", \"\", \"b\", \"c\", \"\")

I am looking for a way to create:

Array(\"a\", \"a\"         


        

Answer 1

Not sure if this is an elegant way, but figured out one solution:

var temp = "" 
arr.map{ case "" => { temp }; case v => {temp=v; v } }