boolean_utility.js

// Returns true if *all* parameters are true
const all = (...args) => (
  args.reduce(
    (answer, current) => answer && current,
    true
  )
);

// Returns true if *any* of the parameters is true
const any = (...args) => (
  args.reduce(
    (answer, current) => answer || current,
    false
  )
);

// Returns false if *none* of the parameters is true
const none = (...args) => (
  args.reduce(
    (answer, current) => answer && !current,
    true
  )
);