M (Math)

Single-argument

inc(n: number): number
dec(n: number): number
negate(n: number): number
product(arr: number[]): number

Curried

add(b: number): (a: number) => number
subtract(b: number): (a: number) => number
multiply(b: number): (a: number) => number
divide(b: number): (a: number) => number
modulo(b: number): (a: number) => number

Examples

import { pipe } from '@stopcock/fp'
import * as A from '@stopcock/fp/array'
import * as M from '@stopcock/fp/math'

// apply discount
pipe(prices, A.map(M.multiply(0.9))) // 10% off

// offset scores
pipe(rawScores, A.map(M.add(curve)))

// compound product
M.product([2, 3, 4]) // 24

// counter operations
pipe(count, M.inc) // count + 1
pipe(count, M.dec) // count - 1
pipe(value, M.negate) // -value

// bare curried call
M.modulo(5)(17) // 2