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1
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1answer
73 views

ADT design choices

How do you go about deciding which of the following two representations (in F# syntax) is the right choice in a particular situation? type Choice = A of string | B of string Or: type ChoiceKind = ...
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3answers
110 views

What do I use for a variant in a UML class diagram?

Does standard UML specify how a variant (aka tagged union, discriminated union, sum type, etc) should be depicted in a class diagram?
7
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1answer
118 views

I'm being warned that the Monoid I'm creating is an Orphan Instance. Is there a better way to write this functionality in?

type PromptSegment = IO (Maybe String) instance Monoid a => Monoid (IO a) where mempty = return mempty mappend = liftA2 (<>) This behaves exactly how I want for my purposes. For ...
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3answers
203 views

What procedural languages support algebraic data types? [closed]

One of the things I like about the new Apple language Swift is that it combines procedural programming with algebraic data types. What other languages do this?
25
votes
1answer
625 views

Performance of single-assignment ADT oriented code on modern CPUs

Working in immutable data with single assignments has the obvious effect of requiring more memory, one would presume, because you're constantly creating new values (though compilers under the covers ...
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2answers
2k views

Matrix Pattern Recognition Algorithm

I am designing a logic analyzer and I would like to implement some Matrix Algorithm. I have several channels each one represented by a row in the matrix and every element in the column would be the ...
25
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6answers
3k views

How do you encode Algebraic Data Types in a C#- or Java-like language?

There are some problems which are easily solved by Algebraic Data Types, for example a List type can be very succinctly expressed as: data ConsList a = Empty | ConsCell a (ConsList a) consmap f ...