Boolean (original) (raw)
scala.Boolean
See theBoolean companion object
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.
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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.
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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.
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Note
This method evaluates both a and b, even if the result is already determined after evaluating a.
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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.
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Note
This method uses 'short-circuit' evaluation and behaves as if it was declared as def &&(x: => Boolean): Boolean. If a evaluates to false, false is returned without evaluating b.
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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.
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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`. `
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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.
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Returns
the negated expression
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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.
Attributes
Note
This method evaluates both a and b, even if the result is already determined after evaluating a.
Source
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.
Attributes
Note
This method uses 'short-circuit' evaluation and behaves as if it was declared as def ||(x: => Boolean): Boolean. If a evaluates to true, true is returned without evaluating b.
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