Scala Tutorial - GroupBy Function Example
allaboutscala.com › scala-groupby-exampleMar 16, 2018 · The groupBy method takes a predicate function as its parameter and uses it to group elements by key and values into a Map collection. As per the Scala documentation, the definition of the groupBy method is as follows: groupBy [ K]( f: ( A) ⇒ K): immutable. Map [ K, Repr] The groupBy method is a member of the TraversableLike trait. Steps 1.
GroupBy in scala - Stack Overflow
stackoverflow.com › questions › 33472496Nov 2, 2015 · GroupBy in scala Ask Question Asked 7 years, 2 months ago Modified 3 years, 9 months ago Viewed 3k times 6 I have val a = List ( (1,2), (1,3), (3,4), (3,5), (4,5)) I am using A.groupBy (_._1) which is groupBy with the first element. But, it gives me output as Map (1 -> List ( (1,2) , (1,3)) , 3 -> List ( (3,4), (3,5)), 4 -> List ( (4,5)))
Scala groupBy for a list - Stack Overflow
stackoverflow.com › questions › 47327360Feb 4, 2019 · Scala groupBy for a list. Ask Question. Asked 5 years, 2 months ago. Modified 5 months ago. Viewed 27k times. 18. I'd like to create a map on which the key is the string and the value is the number of how many times the string appears on the list. I tried the groupBy method, but have been unsuccessful with that. scala.
GroupBy in scala - Stack Overflow
https://stackoverflow.com/questions/33472496GroupBy in scala Ask Question Asked 7 years, 2 months ago Modified 3 years, 9 months ago Viewed 3k times 6 I have val a = List ( (1,2), (1,3), (3,4), (3,5), …