Module Js_option

type 'a t = 'a option
val some : 'a -> 'a option
val isSome : 'a option -> bool
val isSomeValue : ('a -> 'a -> bool) Js.Fn.arity2 -> 'a -> 'a option -> bool
val isNone : 'a option -> bool
val getExn : 'a option -> 'a
val equal : ('a -> 'b -> bool) Js.Fn.arity2 -> 'a option -> 'b option -> bool
val andThen : ('a -> 'b option) Js.Fn.arity1 -> 'a option -> 'b option
val map : ('a -> 'b) Js.Fn.arity1 -> 'a option -> 'b option
val getWithDefault : 'a -> 'a option -> 'a
val default : 'a -> 'a option -> 'a
  • deprecated Use getWithDefault instead since default has special meaning in ES module
val filter : ('a -> bool) Js.Fn.arity1 -> 'a option -> 'a option
val firstSome : 'a option -> 'a option -> 'a option