Hi all,
For chapter 4, I've implmented filter like this:
def filter(f: A => Boolean): Option[A] = this map(f) match {
case Some(true) => this
case _ => None
}
but the answer key has it like this:
def filter(f: A => Boolean): Option[A] = this match {
case Some(a) if f(a) => this
case _ => None
}
Is there something inefficient or not-best-practice about the way I've done
it or is this just another possible implementation?
Thanks,
gjk
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