true if obj1 and obj2 are the same. For value
types, this returns
true if the objects have equivalent
state. In other words, numbers, strings, booleans, and ranges compare by value.
For all other objects, this returns
true only if obj1 and obj2 refer to
the exact same object in memory.
This is similar to the built in
== operator in Object except that this cannot
be overriden. It allows you to reliably access the built-in equality semantics
even on user-defined classes.
false, since most objects are considered true.
Compares two objects using built-in equality. This compares value types by value, and all other objects are compared by identity—two objects are equal only if they are the exact same object.
true if this object’s class or one of its superclasses is
System.print(123 is Num) true System.print("s" is Num) false System.print(null is String) false System.print( is List) true System.print( is Sequence) true
It is a runtime error if
class is not a Class.
A default string representation of the object.
The Class of the object.