This is a proposal for a lightning talk at the Reactive 2015 conference.
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React just got stateless components, meaning that they are in essence pure functions for rendering. Pure functions make it dead simple - even fun - to refactor your views
$ node --version
v5.2.0$ npm ls
[email protected] /home/tylor/code/most/test/perf
├── @reactivex/[email protected]
├── [email protected]
The term variance describes how subtyping between higher kinded types is related to subtyping relations of their type arguments.
A higher kinded type composes type arguments to a new type. I use square bracket notation to define a higher kinded type:
C[T] // The higher kinded type `C` composes type argument `T` to a new type `C[T]`.The same works with multiple type arguments: