scala.collection.JavaConversions.JMapWrapper

WithFilter

class WithFilter extends AnyRef

A class supporting filtered operations. Instances of this class are returned by method withFilter.

definition classes: TraversableLike

Inherits

  1. AnyRef
  2. Any

Value Members

  1. def equals(arg0: Any): Boolean

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    The default implementations of this method is an equivalence relation:

    • It is reflexive: for any instance x of type Any, x.equals(x) should return true.
    • It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true.
    • It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

    If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects that are "equal" (o1.equals(o2) returns true) hash to the same Int (o1.hashCode.equals(o2.hashCode)).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    definition classes: AnyRef ⇐ Any

  2. def flatMap[B](f: (A) ⇒ Traversable[B]): Traversable[B]

    [use case] Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p and concatenating the results

    [use case]

    Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p and concatenating the results.

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new traversable collection resulting from applying the given collection-valued function f to each element of the outer traversable collection that satisfies predicate p and concatenating the results.

    attributes: abstract

  3. def flatMap[B, That](f: (A) ⇒ Traversable[B])(bf: CanBuildFrom[Repr, B, That]): That

    Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p and concatenating the results

    Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p and concatenating the results.

    B

    the element type of the returned collection.

    That

    the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.

    f

    the function to apply to each element.

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.

    returns

    a new collection of type That resulting from applying the given collection-valued function f to each element of the outer traversable collection that satisfies predicate p and concatenating the results.

  4. def foreach(f: (A) ⇒ Unit): Unit

    [use case] Applies a function f to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p

    [use case]

    Applies a function f to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p.

    f

    the function that is applied for its side-effect to every element. The result of function f is discarded.

    attributes: abstract

  5. def foreach[U](f: (A) ⇒ U): Unit

    Applies a function f to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p

    Applies a function f to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p.

    U

    the type parameter describing the result of function f. This result will always be ignored. Typically U is Unit, but this is not necessary.

    f

    the function that is applied for its side-effect to every element. The result of function f is discarded.

  6. def hashCode(): Int

    Returns a hash code value for the object

    Returns a hash code value for the object.

    The default hashing algorithm is platform dependent.

    Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

    definition classes: AnyRef ⇐ Any

  7. def map[B](f: (A) ⇒ B): Traversable[B]

    [use case] Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p

    [use case]

    Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p.

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new traversable collection resulting from applying the given function f to each element of the outer traversable collection that satisfies predicate p and collecting the results.

    attributes: abstract

  8. def map[B, That](f: (A) ⇒ B)(bf: CanBuildFrom[Repr, B, That]): That

    Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p

    Builds a new collection by applying a function to all elements of the outer traversable collection containing this WithFilter instance that satisfy predicate p.

    B

    the element type of the returned collection.

    That

    the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.

    f

    the function to apply to each element.

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.

    returns

    a new collection of type That resulting from applying the given function f to each element of the outer traversable collection that satisfies predicate p and collecting the results.

  9. def toString(): String

    Returns a string representation of the object

    Returns a string representation of the object.

    The default representation is platform dependent.

    definition classes: AnyRef ⇐ Any

  10. def withFilter(q: (A) ⇒ Boolean): WithFilter

    Further refines the filter for this traversable collection

    Further refines the filter for this traversable collection.

    q

    the predicate used to test elements.

    returns

    an object of class WithFilter, which supports map, flatMap, foreach, and withFilter operations. All these operations apply to those elements of this traversable collection which satify the predicate q in addition to the predicate p.

Instance constructors

  1. new WithFilter(p: (A) ⇒ Boolean)

  2. new WithFilter()