trait MapWhile[+T, I <: Iterable[T]] extends AnyRef
Can be used to add a mapWhile()
function to a collection type.
- T
type of value contained in the collection
- I
the collection, which must be a subclass of
Iterable[T]
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def
mapWhile[U, J](mapper: (T) ⇒ U, predicate: (U) ⇒ Boolean)(implicit cbf: scala.collection.compat.Factory[U, J]): J
Perform a map on an
Iterable
subclass until the predicate function returnsfalse
.Perform a map on an
Iterable
subclass until the predicate function returnsfalse
. Combinesmap()
andtakeWhile()
in a more efficient manner. The predicate is called after the mapping operation is performed.- U
the type of the returned subclass
- J
the type of the returned
Iterable
subclass- mapper
the mapper function
- predicate
the predicate. The mapping operation will continue until this function returns
false
or the iterable is exhausted- cbf
the
CanBuildFrom
factory, which allows this function to make an instance of the subclass without knowing what it is- returns
the mapped (and possibly filtered) result
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