Negation function for less verbose code

not.js

function not(predicate) {
  return function negate(...args) {
    return !predicate(...args);
  }
}

// Usage
// ==============================

function longEnough(str) {
  return str.length > 10;
}
const tooShort = not(longEnough);

console.log(longEnough('Does this work?')); // true
console.log(tooShort('Does this work?')); // false