scala.collection.generic

Subtractable

trait Subtractable[A, +Repr <: Subtractable[A, Repr]] extends AnyRef

This trait represents collection-like objects that can be reduced using a '+' operator. It defines variants of - and -- as convenience methods in terms of single-element removal -.

A

the type of the elements of the $coll.

Repr

the type of the $coll itself

known subclasses: MapLike, SetLike, BufferLike

Inherits

  1. AnyRef
  2. Any

Value Members

  1. def -(elem1: A, elem2: A, elems: A*): Repr

    Creates a new $coll from this $coll with some elements removed

    Creates a new $coll from this $coll with some elements removed.

    This method takes two or more elements to be removed. Another overloaded variant of this method handles the case where a single element is removed.

    elem1

    the first element to remove.

    elem2

    the second element to remove.

    elems

    the remaining elements to remove.

    returns

    a new $coll that contains all elements of the current $coll except one less occurrence of each of the given elements.

  2. def -(elem: A): Repr

    Creates a new $coll from this $coll with an element removed

    Creates a new $coll from this $coll with an element removed.

    elem

    the element to remove

    returns

    a new collection that contains all elements of the current $coll except one less occurrence of elem.

    attributes: abstract
  3. def --(iter: Iterator[A]): Repr

    Creates a new $coll from this $coll by removing all elements produced by an iterator

    Creates a new $coll from this $coll by removing all elements produced by an iterator.

    iter

    the iterator producing the removed elements.

    returns

    a new $coll that contains all elements of the current $coll except one less occurrence of each of the elements produced by iter.

  4. def --(elems: Traversable[A]): Repr

    Creates a new $coll from this $coll by removing all elements of another collection

    Creates a new $coll from this $coll by removing all elements of another collection.

    elems

    the collection containing the removed elements.

    returns

    a new $coll that contains all elements of the current $coll except one less occurrence of each of the elements of elems.

  5. 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
  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 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