Why is late binding useful?
The primary advantage of using late binding in Component Object Model (COM) programming is that it does not require the compiler to reference the libraries that contain the object at compile time.
When should one use late binding in OOP?
Late binding facilitates working with generic types, which means that the same type for assigning different objects may be reused. Late binding forms the basis for potential polymorphism. Originally introduced in Smalltalk, Microsoft adopted the late binding concept in its component object model (COM) technology.
What does late binding mean for a method call?
Late binding in its book definition form means that the compiler should perform no argument checks, no type checks on a method call and should leave it all to the runtime – because possibly the compiler does not have access to the method implementation code (for example in COM programming).
When does late binding occur in a language?
Late Binding: type is unknown until the variable is exercised during run-time; usually through assignment but there are other means to coerce a type; dynamically typed languages call this an underlying feature, but many statically typed languages have some method of achieving late binding
Can a strongly typed language be a weakly typed language?
Dynamically typed languages (where type checking happens at run time) can also be strongly typed. Note that in dynamically typed languages, values have types, not variables. A weakly typed language has looser typing rules and may produce unpredictable or even erroneous results or may perform implicit type conversion at runtime.
What makes a language statically or dynamically typed?
1 Static typed languages. A language is statically-typed if the type of a variable is known at compile-time instead of at run-time. 2 Dynamically typed languages. A language is dynamically-typed if the type of a variable is checked during run-time. 3 Strongly typed languages. 4 Weakly typed languages. 5 Conclusion.
Why are some programming languages called weak typing?
These languages are sometimes referred to as “weakly typed”, since pointer arithmetic can be used to bypass the language’s type system. Some programming languages support untagged unions, which allow a value of one type to be viewed as if it were a value of another type.