This class represents values which are evaluated lazily and which may even be missing.
It has Option-like function and can be also converted to an Either object
Attributes
- Companion:
- object
- Graph
- Supertypes
- trait Serializabletrait Producttrait Equalsclass Objecttrait Matchableclass Any
Members list
Value members
Concrete methods
Compares the receiver object (this
) with the argument object (that
) for equivalence.
Compares the receiver object (this
) with the argument object (that
) for equivalence.
Any implementation of this method should be an equivalence relation:
- It is reflexive: for any instance
x
of typeAny
,x.equals(x)
should returntrue
. - It is symmetric: for any instances
x
andy
of typeAny
,x.equals(y)
should returntrue
if and only ify.equals(x)
returnstrue
. - It is transitive: for any instances
x
,y
, andz
of typeAny
ifx.equals(y)
returnstrue
andy.equals(z)
returnstrue
, thenx.equals(z)
should returntrue
.
If you override this method, you should verify that your implementation remains an equivalence relation.
Additionally, when overriding this method it is usually necessary to override hashCode
to ensure that
objects which are "equal" (o1.equals(o2)
returns true
) hash to the same scala.Int.
(o1.hashCode.equals(o2.hashCode)
).
Attributes
- that
the object to compare against this object for equality.
- Returns:
true
if the receiver object is equivalent to the argument;false
otherwise.- Definition Classes
- Equals -> Any
return the property with the value being filtered according to a predicate
return the property with the value being filtered according to a predicate
Attributes
option-like flatMap
option-like flatMap
Attributes
option-like foreach
option-like foreach
Attributes
option-like getOrElse
option-like getOrElse
Attributes
Calculate a hash code value for the object.
Calculate 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.
Attributes
- Returns:
the hash code value for this object.
- Definition Classes
- Any
option-like isDefined
option-like isDefined
Attributes
option-like isEmpty
option-like isEmpty
Attributes
Attributes
- Returns:
an iterator containing the value if present
Attributes
- Returns:
the option(value)
option-like orElse
option-like orElse
Attributes
change the value and return Unit
change the value and return Unit
Attributes
option-like toLeft
option-like toLeft
Attributes
to a list
to a list
Attributes
alias for optionalValue
alias for optionalValue
Attributes
option-like toRight
option-like toRight
Attributes
Returns a string representation of the object.
Returns a string representation of the object.
The default representation is platform dependent.
Attributes
- Returns:
a string representation of the object.
- Definition Classes
- Any
change the value
change the value
Attributes
Inherited methods
Attributes
- Inherited from:
- Product
Attributes
- Inherited from:
- Product