How can I translate this loop (in Java) to Scala?
for(int i = 0, j = 0; i < 10; i++, j++) {
//Other code
}
My end goal is to loop through two lists at the same time. I want to get both elements at the same time at each index in the iteration.
for(a <- list1, b <- list2) // doesn't work
for(a <- list1; b <- list2) // Gives me the cross product
Use .zip() to make a list of tuple and iterate over it.
val a = Seq(1,2,3)
val b = Seq(4,5,6)
for ((i, j) <- a.zip(b)) {
println(s"$i $j")
}
// It prints out:
// 1 4
// 2 5
// 3 6
If you have multiple list to iterate over, just use .zipped on the tuple of the lists.
val l1 = List(1, 2, 3)
val l2 = List(4, 5, 6)
val l3 = List("a", "b", "c")
for ((c1, c2, c3) <- (l1, l2, l3).zipped) {
println(s"$c1, $c2, $c3")
}
//Prints
1, 4, a
2, 5, b
3, 6, c
