Utility

Provides utility functions.

Function or value	Description
`choose size count` Signature: size:int -> count:int -> GeneratorFunction<int list>	Returns random indices of collections.
`chooseOne upper` Signature: upper:int -> GeneratorFunction<int>	Returns a random number less than the specified value.
`createRandomState ()` Signature: unit -> PrngState	Creates a random random state.
`defaultState` Signature: PrngState	Provides a default random state.
`flipCoin probability` Signature: probability:float -> GeneratorFunction<bool>	Returns a random Boolean value with the specified probability.
`randomSign ()` Signature: unit -> GeneratorFunction<^a> Type parameters: ^a	Returns +1 or -1 randomly.