WaldoJeffers

const numbers = [3, 1, 4]
const isEven = x => Promise.resolve(x => x % 2 === 0)

WaldoJeffers

import { identity, map, compose, forEach } from 'ramda'

const withCatchAll = fn => (...args) => fn(...args).catch(identity)
const unsafeInsert = witchCatchAll(insert)

await Promise.all(map(compose(unsafeInsert, stripOneMandatoryParam)), MANDATORY_PARAMS).then(forEach(expectToThrow))

WaldoJeffers

const curry = (fn, arity = fn.length) => (...args) => args.length >= arity ? fn(...args) : (...moreArgs) => curry(fn)(...args, ...moreArgs)

// tests
const _add = (a, b, c) => a + b + c

describe('curry', () => {
  it('should currify the input function', () => {
    const add = curry(_add)
    expect(add(1, 2, 3)).toBe(6)
    expect(add(1)(2)(3)).toBe(6)

WaldoJeffers

const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)))

// Usage : compose functions right to left
// compose(minus8, add10, multiply10)(4) === 42
//
// The resulting function can accept as many arguments as the first function does
// compose(add2, multiply)(4, 10) === 42