Switch
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Switch clauses are made of a tuples of function predicates and functions.
To use them add an indentation level and the function predicate wrapped with the keyword : and followed by the function.
If you want to define a default case, you can use the keyword default or none as the function predicate.
Example
state
: isDog : addTail
: isCat : addNineLifes
const state = () => ({ type: 'DOG' })
const isDog = ({ type }) => type === 'DOG'
const isCat = ({ type }) => type === 'CAT'
const addTail = (state) => ({ ...state, tail: true })
const addNineLifes = (state) => ({ ...state, lifes: 9 })
{ type: 'DOG', tail: true }
Example with default case
state
: isDog : addTail
: isCat : addNineLifes
: default : addEyes
const state = () => ({ type: 'BEAR' })
const isDog = ({ type }) => type === 'DOG'
const isCat = ({ type }) => type === 'CAT'
const addTail = (state) => ({ ...state, tail: true })
const addNineLifes = (state) => ({ ...state, lifes: 9 })
const addEyes = (state) => ({ ...state, eyes: true })
{ type: 'BEAR', eyes: true }