mathjs/src/plain/number/logical.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

const n1 = 'number'
const n2 = 'number, number'

export function notNumber (x) {
  return !x
}
notNumber.signature = n1

export function orNumber (x, y) {
  return !!(x || y)
}
orNumber.signature = n2

export function xorNumber (x, y) {
  return !!x !== !!y
}
xorNumber.signature = n2

export function andNumber (x, y) {
  return !!(x && y)
}
andNumber.signature = n2