module Core_random:sig
..end
Random
module to be different from OCaml's standard one:
Random.State.default
, so that user code can easily share the default
random state if it wants.Random.get_state
, because it misleadingly makes a copy of random
state. And it is what people naturally, albeit incorrectly, grab for when they want
to use shared random state.val init : int -> unit
val full_init : int array -> unit
Random.init
but takes more data as seed.val self_init : unit -> unit
val bits : unit -> int
val int : int -> int
Random.int bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0 and less than 230.val int32 : Int32.t -> Int32.t
Random.int32 bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0.val nativeint : Nativeint.t -> Nativeint.t
Random.nativeint bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0.val int64 : Int64.t -> Int64.t
Random.int64 bound
returns a random integer between 0 (inclusive) and bound
(exclusive). bound
must be greater than 0.val float : float -> float
Random.float bound
returns a random floating-point number between 0 (inclusive) and
bound
(exclusive). If bound
is negative, the result is negative or zero. If
bound
is 0, the result is 0.val bool : unit -> bool
Random.bool ()
returns true
or false
with probability 0.5 each.module State:sig
..end
State
manipulate the current state
of the random generator explicitely.
val get_state : unit -> [ `Consider_using_Random_State_default ]
Random.get_state
makes a copy of the default state, which is almost
certainly not what you want. State.default
, which is the actual default state, is
probably what you want.val set_state : State.t -> unit