On 11/01/14 15:12, Kagamin wrote:
Only the cast breaks the type system, I go through holes. It's just a joke,
purity and immutability are valued for their deterministic traits, so a random
number generator is the last thing one would want to make pure or immutable.
That depends on your concept of a PRNG. Strictly speaking it can/should
consist of
(i) an immutable state
(ii) a pure function that takes as input the current immutable state and
returns a new immutable state.
In practice, of course, it's almost invariably easier to implement this as a
type that has mutable internal state.
