F Use Discriminated Unions Instead Of Class Hierarchies Theburningmonk Com

F# - Use Discriminated Unions Instead Of Class Hierarchies | Theburningmonk.com

F# - Use Discriminated Unions Instead Of Class Hierarchies | Theburningmonk.com Since i’ve been on a more varied diet of programming paradigms i’m much more open to the idea of using f#’s discriminated unions to represent hierarchical data. Discriminated unions are useful for heterogeneous data; data that can have special cases, including valid and error cases; data that varies in type from one instance to another; and as an alternative for small object hierarchies.

F# - Use Discriminated Unions Instead Of Class Hierarchies | Theburningmonk.com

F# - Use Discriminated Unions Instead Of Class Hierarchies | Theburningmonk.com Discriminated unions # you can combine singleton types, union types, type guards, and type aliases to build an advanced pattern called discriminated unions, also known as tagged unions or algebraic data types. Unions, or discriminated unions allows you to build up complex data structures representing well defined set of choices. for example, you need to build an implementation of a choice variable, which has two values yes and no. using the unions tool, you can design this. Discriminated unions allow us to associate zero or more data items of any type with each case. the effect is that we can easily define tree structures, simple object hierarchies, and even leverage pattern matching. Discriminated unions give you value semantics for free; class hierarchies make you work for it. on the other hand, the fact that c# makes you write all that code out by hand does give you more control over the behaviour of your type.

F# - Use Discriminated Unions Instead Of Class Hierarchies | Theburningmonk.com

F# - Use Discriminated Unions Instead Of Class Hierarchies | Theburningmonk.com Discriminated unions allow us to associate zero or more data items of any type with each case. the effect is that we can easily define tree structures, simple object hierarchies, and even leverage pattern matching. Discriminated unions give you value semantics for free; class hierarchies make you work for it. on the other hand, the fact that c# makes you write all that code out by hand does give you more control over the behaviour of your type. Whether using discriminated unions in f# or exploring closed type hierarchies in c#, the goal remains: clear, maintainable, and robust code that accurately represents business logic and reduces room for errors. One of the problems with using f#’s discriminated unions is that they are not extensible, in that all your union cases must be specified inside one discriminated union (abbreviated to du from this point) type and you can’t inherit from an existing du type to add additional union cases. Using f#’s discriminated unions we can create a generic tree type that are composed of two subtypes, leaf and node, each with a different set of associated types. we can then use pattern. Discriminated unions are the answer to this. they form a core part of the type system in f# and are extremely useful. with them added to f#, you can effectively model domains quickly and succinctly for both and and or cases.

F# Discriminated Unions Versus C# Class Hierarchies - Stack Overflow

F# Discriminated Unions Versus C# Class Hierarchies - Stack Overflow Whether using discriminated unions in f# or exploring closed type hierarchies in c#, the goal remains: clear, maintainable, and robust code that accurately represents business logic and reduces room for errors. One of the problems with using f#’s discriminated unions is that they are not extensible, in that all your union cases must be specified inside one discriminated union (abbreviated to du from this point) type and you can’t inherit from an existing du type to add additional union cases. Using f#’s discriminated unions we can create a generic tree type that are composed of two subtypes, leaf and node, each with a different set of associated types. we can then use pattern. Discriminated unions are the answer to this. they form a core part of the type system in f# and are extremely useful. with them added to f#, you can effectively model domains quickly and succinctly for both and and or cases.

F# Discriminated Unions Vs. C# Class Hierarchies: A Design Perspective - DEV Community

F# Discriminated Unions Vs. C# Class Hierarchies: A Design Perspective - DEV Community Using f#’s discriminated unions we can create a generic tree type that are composed of two subtypes, leaf and node, each with a different set of associated types. we can then use pattern. Discriminated unions are the answer to this. they form a core part of the type system in f# and are extremely useful. with them added to f#, you can effectively model domains quickly and succinctly for both and and or cases.

Part 1: Mike Falanga speaks about Discriminated Unions at Cleveland F# SIG