Question

Is this an acceptable approach for removing multiple character types from a string or is there a better (more efficient way)? The "ilr".contains(_) bit feels a little like cheating considering it will be done for each and every character, but then again, maybe this is the right way. Is there a faster or more efficient way to do this?

val sentence = "Twinkle twinkle little star, oh I wander what you are"

val words = sentence.filter(!"ilr".contains(_))   

// Result: "Twnke twnke tte sta, oh I wande what you ae"

Answer 1

There would be no significant difference, since there is only 3 characters to remove and no so big string to filter, but you may consider to use Set for this purpose. E.g.

val toRemove = "ilr".toSet
val words = sentence.filterNot(toRemove)