Philosophy documentation

[Raynos]

We should document the core philosophy of mercury.

Idempotence

The following hold.

render(A); render(A); === render(A);

render(A); render(B); === render(B);

[Raynos]

Normalized central state

Because all your state is in a top level state atom for your entire application you can ensure this state atom is in a normalized format.

This means there is only one mutable source of truth for any entity which removes an entire realm of problems like cache invalidation, shared state, replication, etc

see http://blog.getprismatic.com/om-sweet-om-high-functional-frontend-engineering-with-clojurescript-and-react/