@truepic/queryql/src/services/cache_function.js

Easily add filtering, sorting, and pagination to your REST API through your old friend: the query string!

// Caches the return value of the first call to the function and returns that on
// subsequent calls. Only works with functions without arguments.
module.exports = (func, bind = undefined) => {
  let cache = undefined

  return () => {
    if (cache === undefined) {
      cache = func.call(bind)
    }

    return cache
  }
}