101 cheatsheet

const isObject = require('101/isObject')
isObject({}) // → true

Every function is exposed as a module.

See: 101

isObject({})
isString('str')
isRegExp(/regexp/)
isBoolean(true)
isEmpty({})
isfunction(x => x)
isInteger(10)
isNumber(10.1)
instanceOf(obj, 'string')

Objects

let obj = {}

obj = put(obj, 'user.name', 'John')
// → { user: { name: 'John' } }

pluck(name, 'user.name')
// → 'John'

obj = del(obj, 'user')
// → { }

pluck(state, 'user.profile.name')

pick(state, ['user', 'ui'])
pick(state, /^_/)

pluck returns values, pick returns subsets of objects.

put(state, 'user.profile.name', 'john')

See: put

del(state, 'user.profile')
omit(state, ['user', 'data'])

omit is like del, but supports multiple keys to be deleted.

hasKeypaths(state, ['user'])
hasKeypaths(state, { 'user.profile.name': 'john' })

values(state)

Useful for function composition.

compose(f, g)       // x => f(g(x))
curry(f)            // x => y => f(x, y)
flip(f)             // f(x, y) --> f(y, x)

passAll(f, g)       // x => f(x) && g(x)
passAny(f, g)       // x => f(x) || g(x)

converge(and, [pluck('a'), pluck('b')])(x)

// → and(pluck(x, 'a'), pluck(x, 'b'))

find(list, x => x.y === 2)
findIndex(list, x => ...)
includes(list, 'item')
last(list)

find(list, hasProps('id'))

groupBy(list, 'id')
indexBy(list, 'id')

isFloat = passAll(isNumber, compose(isInteger, not))
// n => isNumber(n) && not(isInteger(n))

function doStuff (object, options) { ... }

doStuffForce = curry(flip(doStuff))({ force: true })