package bonsai

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package bonsai
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val state_machine01 : (module Model with type t = 'model) -> (module Action with type t = 'dynamic_action) -> (module Action with type t = 'static_action) -> ?reset: (inject_dynamic:('dynamic_action -> unit Effect.t) -> inject_static:('static_action -> unit Effect.t) -> schedule_event:(unit Effect.t -> unit) -> 'model -> 'model) -> default_model:'model -> apply_dynamic: (inject_dynamic:('dynamic_action -> unit Effect.t) -> inject_static:('static_action -> unit Effect.t) -> schedule_event:(unit Effect.t -> unit) -> 'input -> 'model -> 'dynamic_action -> 'model) -> apply_static: (inject_dynamic:('dynamic_action -> unit Effect.t) -> inject_static:('static_action -> unit Effect.t) -> schedule_event:(unit Effect.t -> unit) -> 'model -> 'static_action -> 'model) -> 'input Value.t -> ('model * ('dynamic_action -> unit Effect.t) * ('static_action -> unit Effect.t)) Computation.t
val thunk : (unit -> 'a) -> 'a Computation.t

thunk will execute its argument exactly once per instantiation of the computation.

val assoc_on : ('io_key, 'io_cmp) comparator -> ('model_key, 'model_cmp) comparator -> ('io_key, 'data, 'io_cmp) Core.Map.t Value.t -> get_model_key:('io_key -> 'data -> 'model_key) -> f:('io_key Value.t -> 'data Value.t -> 'result Computation.t) -> ('io_key, 'result, 'io_cmp) Core.Map.t Computation.t

assoc_on is similar to assoc, but allows the model to be keyed differently than the input map. This comes with a few caveats:

  • Inputs whose keys map to the same model_key will share the same model.
  • The result of get_model_key is used in a bind, so it is expensive when it changes.

assoc should almost always be used instead. Consider whether you really need the additional power before reaching for this function.

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