How to skip an iteration in a for-loop in Scala?

Question

For example in C you would be able to write

for (int i = 0; i < 10 ; i++) {
  if (i == 2) i += 1
  // do stuff
}

Since Scala uses ranges, how would we modify the iterator?

stefanobaghino · Accepted Answer · 2021-10-07 12:47:07Z

4

You can use a guard:

for (i <- 0 to 10; if i != 2) println(i)

This would print the numbers from 0 to 10, excluding 2.

You can see this code in action an play around with it here on Scastie.

answered Oct 7, 2021 at 12:47

stefanobaghino

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Comments

C4stor · Accepted Answer · 2021-10-07 12:46:57Z

3

You would have multiple solutions, but basically using a .filter() like clause somewhere should do it.

Like (0 to 10).filterNot(_ == 3).foreach(doStuff()) for example

answered Oct 7, 2021 at 12:46

C4stor

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Great :-) don't hesitate to flag one of the answers you found relevant has accepted :-) (if both were, you can pick at random it's all fine :-) )

Thanks :) I'll also come back when I am able to vote, to upvote both answers