package reason-standard

You can search for identifiers within the package.

in-package search v0.2.0

reason-standard
- Standard
  - Array
  - Bool
  - Char
  - Comparator
    
    Make
    
    Comparable
    
    S
    
    T
  - Container
    
    Sum
  - Float
  - Fun
  - Int
  - Integer
  - List
  - Map
    
    Int
    
    Of
    
    M
    
    Poly
    
    String
  - Option
    
    Infix
  - Result
    
    Infix
  - Set
    
    Int
    
    Of
    
    M
    
    Poly
    
    String
  - String
  - Tuple
  - Tuple3

Legend:
Library
Module
Module type
Parameter
Class
Class type

Operators for code that works extensively with Options.

This module is intended to be opened at the top of a block of code (or module) that uses its operators extensively.

let nameToAge = Map.String.ofArray [|
  ("Ant", 1);
  ("Bat", 5);
|] in          

Option.Infix.(
  Map.get nameToAge "Ant" >>= (fun antAge -> 
    Map.get nameToAge "Bat" >>| (fun batAge -> 
      Int.absolute(batAge - antAge)
    )
  )
)
(* Some (4) *)

val (>>|) : 'a option -> ('a -> 'b) -> 'b option

The operator version of map

Examples

Option.Infix.(Some "desserts" >>| String.reverse) = Some "stressed"

Option.Infix.(None >>| String.reverse) = None

val (>>=) : 'a option -> ('a -> 'b option) -> 'b option

The operator version of flatMap

Examples

Option.Infix.(Some [1, 2, 3] >>= List.head) = Some 1

Option.Infix.(Some [] >>= List.head) = None