Boolean (equivalent to Java's boolean primitive type) is a
subtype of scala.AnyVal. Instances of Boolean are not
represented by an object in the underlying runtime system.
There is an implicit conversion from scala.Boolean => scala.runtime.RichBoolean which provides useful non-primitive operations.
- Companion:
- object
- Source:
- Boolean.scala
Value members
Abstract methods
Compares two Boolean expressions and returns true if they evaluate to a different value.
Compares two Boolean expressions and returns true if they evaluate to a different value.
a != b returns true if and only if
- a is true and b is false or
- a is false and b is true.
- Source:
- Boolean.scala
Compares two Boolean expressions and returns true if both of them evaluate to true.
Compares two Boolean expressions and returns true if both of them evaluate to true.
a & b returns true if and only if
- a and b are true.
- Note:
This method evaluates both
aandb, even if the result is already determined after evaluatinga.- Source:
- Boolean.scala
Compares two Boolean expressions and returns true if both of them evaluate to true.
Compares two Boolean expressions and returns true if both of them evaluate to true.
a && b returns true if and only if
- a and b are true.
- Note:
This method uses 'short-circuit' evaluation and behaves as if it was declared as
def &&(x: => Boolean): Boolean. Ifaevaluates tofalse,falseis returned without evaluatingb.- Source:
- Boolean.scala
Compares two Boolean expressions and returns true if they evaluate to the same value.
Compares two Boolean expressions and returns true if they evaluate to the same value.
a == b returns true if and only if
- a and b are true or
- a and b are false.
- Source:
- Boolean.scala
Compares two Boolean expressions and returns true if they evaluate to a different value.
Compares two Boolean expressions and returns true if they evaluate to a different value.
a ^ b returns true if and only if
- a is true and b is false or
- a is false and b is true.
- Source:
- Boolean.scala
Negates a Boolean expression.
Negates a Boolean expression.
- !a results in false if and only if a evaluates to true and
- !a results in true if and only if a evaluates to false.
- Returns:
the negated expression
- Source:
- Boolean.scala
Compares two Boolean expressions and returns true if one or both of them evaluate to true.
Compares two Boolean expressions and returns true if one or both of them evaluate to true.
a | b returns true if and only if
- a is true or
- b is true or
- a and b are true.
- Note:
This method evaluates both
aandb, even if the result is already determined after evaluatinga.- Source:
- Boolean.scala
Compares two Boolean expressions and returns true if one or both of them evaluate to true.
Compares two Boolean expressions and returns true if one or both of them evaluate to true.
a || b returns true if and only if
- a is true or
- b is true or
- a and b are true.
- Note:
This method uses 'short-circuit' evaluation and behaves as if it was declared as
def ||(x: => Boolean): Boolean. Ifaevaluates totrue,trueis returned without evaluatingb.- Source:
- Boolean.scala