Removes the property from the underlying map.
Gets the current string value if any. Will not return null: use isSet to test for existence.
the current string value if any, else the empty string
True if the key exists in the properties map. Note that this is not sufficient for a Boolean property to be considered true.
whether the map contains the key
The full name of the property, e.g., "java.awt.headless".
Some(value) if the property is set, None otherwise.
Sets the property.
the new string value
the old value, or null if it was unset.
Sets the property with a value of the represented type.
The semantics of value are determined at Prop creation. See methods valueIsTrue and keyExists in object BooleanProp for examples.
true if the current String is considered true, false otherwise
A value of type T for use when the property is unset. The default implementation delivers null for reference types and 0/0.0/false for non-reference types.
Test two objects for inequality.
true if !(this == that), false otherwise.
Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.
a hash value consistent with ==
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. This method evaluates both a and b, even if the result is already determined after evaluating a.
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. 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.
The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
true if the receiver object is equivalent to the argument; false otherwise.
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. 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 expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(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 type.
the receiver object.
ClassCastException if the receiver object is not an instance of the erasure of type T0.
Create a copy of the receiver object.
The default implementation of the clone method is platform dependent.
a copy of the receiver object.
Tests whether the argument (that) is a reference to the receiver object (this).
The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:
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).
true if the argument is a reference to the receiver object; false otherwise.
The equality method for reference types. Default implementation delegates to eq.
See also equals in scala.Any.
true if the receiver object is equivalent to the argument; false otherwise.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.
not specified by SLS as a member of AnyRef
Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).
Returns the runtime class representation of the object.
a class object corresponding to the runtime type of the receiver.
The hashCode method for reference types. See hashCode in scala.Any.
the hash code value for this object.
Test whether the dynamic type of the receiver object is T0.
Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.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 specified type.
true if the receiver object is an instance of erasure of type T0; false otherwise.
Equivalent to !(this eq that).
true if the argument is not a reference to the receiver object; false otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Wakes up all threads that are waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
a String representation of the object.
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.
the negated expression
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. This method evaluates both a and b, even if the result is already determined after evaluating a.
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. 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.
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. (booleanProp: Boolean).!=(x)
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. (booleanProp: Boolean).==(x)
© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.12.9/scala/sys/BooleanProp.html
A few additional conveniences for Boolean properties.