If you ever need to create a large test Scala
Map, I just used this approach and it worked fine:
val map = (for (i <- 1 to 5_000_000) yield (i, 10*i)).toMap
The initial results in the Scala REPL look like this:
val map: Map[Int, Int] = HashMap(4584205 -> 45842050, 2231874 -> 22318740, ...
The code works by creating a series of tuples with the yield expression, where each key is
i, and each value is
10*i. Here are a couple of other ways to convert a Scala sequence to a map:
val map = Vector.range(0,1_000_000).map(i => (i, i*10)).toMap val map = Vector.range(0,1_000_000).map(i => i -> i*10).toMap
map method of those two examples, I create a
Tuple2 from each element in the initial
Vector. The examples show two different ways to create a tuple.
If you ever need to create a large Scala
Map for testing, I hope these examples are helpful.