if condition can be moved inside the for loop as an enumerator guard SC-R1062

Scala's for loop has 2 elements — enumerator generator that defines the range for the loop and an enumerator guard, a condition that must be satisfied before the loop's body can be executed. If your for loop has a single statement in its body and this statement is an if condition without an else clause, it is recommended that you move this explicit if condition to the loop.

Bad Practice

for (i <- lb to ub) {
  if (i % 2 == 0) {
    println(i)
  }
}

Recommended

for (i <- lb to ub if i % 2 == 0) {
  println(i)
}