Some

o != arg0 is the same as !(o == (arg0)).

o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

o == arg0 is the same as o.equals(arg0).

This method is used to cast the receiver object to be of type T0.

Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expressionList(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

A method that should be called from every well-designed equals method that is open to be overridden in a subclass . See Programming in Scala, Chapter 28 for discussion and design.

This method creates and returns a copy of the receiver object .

The default implementation of the clone method is platform dependent.

If the given partial function pf is defined for the option's value, apply it to the value . Otherwise, None.

This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on non-null instances of AnyRef: * It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true. * It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and only if y.eq(x) returns true. * It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.

Additionally, the eq method has three other properties. * It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false. * For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false. * null.eq(null) returns true.

When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

The equality method defined in AnyRef.@return true if the receiver object is equivalent to the argument; false otherwise. */

If the option is nonempty, p(value), otherwise false .

If the option is nonempty and the given predicate p yields false on its value, return None . Otherwise return the option value itself.

This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object .

The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.

If the option is nonempty, return a function applied to its value . Otherwise return None.

Apply the given procedure f to the option's value, if it is nonempty . Do nothing if it is empty.

get the value of this option .

Returns a representation that corresponds to the dynamic class of the receiver object .

The nature of the representation is platform dependent.

If the option is nonempty return its value, otherwise return the result of evaluating a default expression .

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.

True if the option is a Some( . ..) false otherwise.

True if the option is the None value, false otherwise .

This method is used to test whether the dynamic type of the receiver object is T0.

Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

An singleton iterator returning the option's value if it is nonempty or the empty iterator if the option is empty .

If the option is nonempty, return a function applied to its value, wrapped in a Some i . e. Some(f(this.get)). Otherwise return None.

o.ne(arg0) is the same as !(o.eq(arg0)).

Wakes up a single thread that is waiting on the receiver object's monitor .

Wakes up all threads that are waiting on the receiver object's monitor .

If the option is nonempty return it, otherwise return the result of evaluating an alternative expression .

The option's value if it is nonempty, or null if it is empty . The use of null of course is discouraged, but code written to use Options often must interface with code which expects and returns nulls.

return k for a product A(x_1, . ..,x_k)

For a product A(x_1, . ..,x_k), returns x_(n+1) for 0 <= n < k

Returns the name of the field at the given index from the definition of the class .

An iterator that returns all fields of this product

By default the empty string . Implementations may override this method in order to prepend a string prefix to the result of the toString methods.

An Either that is a Right with the given argument right if this is empty, or a Left if this is nonempty with the option's value .

A singleton list containing the option's value if it is nonempty or the empty list if the option is empty .

An Either that is a Left with the given argument left if this is empty, or a Right if this is nonempty with the option's value .

Returns a string representation of the object .

The default representation is platform dependent.

Necessary to keep Option from being implicitly converted to Iterable in for comprehensions .