ReasonML: Hands-On Intro

By: Rob Hilgefort

Rob Hilgefort

• Email: rjhilgefort@gmail.com

• Twitter: @rjhilgefort

• GitHub: rjhilgefort

• Web: http://rob.hilgefort.me

• 10 Years Professional JS

• 3 Years FP in JS

• 6 Months ReasonML

Why ReasonML...?

JavaScript

• JavaScript isn't opinionated and tries to support OOP and FP equally (debatably).
• JavaScript is ... JavaScript.
• Defensive Coding

FP By Default

- Immutable

- Auto-curried

- Composition- Pipe operator

- Pattern Matching

- Plus more...
 

Statically Typed

- Battle tested Ocaml compiler and type system

- 100% coverage

Isomorphic

- Runs on the BE and FE

- JS is popular largely due to this

- Can run natively on BE if desired

Batteries Included DX

Ecosystem

REPL Examples Topics

• Imperative Loops
• Mutating
• Currying
• Partial Applications
• Basic Types
• Pervasives (Built-Ins)
• Infix Operators
• Strings
• Bucklescript / JS Funcs
• Expressions, Blocks
• Implicit Returns

• Switch Expressions
• Pipe Operator
• Composition
• Modules
• Variants
• Pattern Matching
• Variant Constructors
• Record Type
• Shorthands (Fn, Switch)
• Labeled Arguments
• Option Variant
• Fast Piping

😱 Live Coding 😱

Thank You

• Email: rjhilgefort@gmail.com

• Twitter: @rjhilgefort

• GitHub: rjhilgefort

• Web: http://rob.hilgefort.me