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Results tagged with polymorphism
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user 1352
Polymorphism is about using objects of a type uniformly, regardless of their subtype.
11
votes
Accepted
How do you use duck typing in javascript without always checking for properties and methods?
I know javascript uses duck typing and at first I thought this would make polymorphism easy compared to strongly typed languages like C#.
You are confusing multiple orthogonal axis of typing here. …
- 104k
9
votes
How to tackle extensibility considering the Data/Object Anti-Symmetry?
This has been termed the Expression Problem by Phil Wadler, although it is much older than the discussion in which he came up with this term. Solving it is one of the "holy grails" of Programming Lang …
- 104k
9
votes
What is polymorphism if you can already have methods that are the same defined in different ...
So circle1 and rectangle1 understood the same message draw() without using Polymorphism!
What makes you think they are not using Polymorphism?
Am I missing something? … Yes: that what you describe is Polymorphism, by definition. …
- 104k
6
votes
What is the process of determining which method in a class hierarchy should execute known as?
None of the above. There is no universal term, it depends on the language and the community, but the correct answer is one of
message dispatch
(virtual) method dispatch
(virtual) method resolution
…
- 104k
4
votes
What is the difference between Haskell's type classes and Go's interfaces?
They are completely different. Go interfaces define a protocol for values, Haskell type classes define a protocol for types. (That's why they are called "type classes", after all. They classify types, …
- 104k
3
votes
Accepted
Is 'design with types first' ultimately the same as 'design with interfaces first'?
In Java-like languages, interfaces describe object types, classes describe abstract data types. "Design with interfaces first" is not the same as "design with types first", simply because in a Java-li …
- 104k
3
votes
What is Polymorphism?
The most widely-used and most well-known type of polymorphism is probably parametric polymorphism (also sometimes known as generics). … This is by no means an exhaustive list, we haven't talked about inclusion polymorphism, subtype polymorphism, F-bounded polymorphism, or the various forms of ad-hoc polymorphism (for example, Haskell's …
- 104k