UnorderedFoldableOps
class AnyVal
trait Matchable
class Any
Value members
Concrete methods
Count the number of elements in the structure that satisfy the given predicate.
Count the number of elements in the structure that satisfy the given predicate.
For example:
scala> import cats.implicits._
scala> val map1 = Map[Int, String]()
scala> val p1: String => Boolean = _.length > 0
scala> map1.count(p1)
res0: Long = 0
scala> val map2 = Map(1 -> "hello", 2 -> "world", 3 -> "!")
scala> val p2: String => Boolean = _.length > 1
scala> map2.count(p2)
res1: Long = 2