hfp-curry-001.js

// Curry Function as shown in "Hardcore Functional Programming in JS"

function curry(fn) {
  return function () {
    // if there are fewer provided args than originally intended
    if (fn.length > arguments.length) {
      var slice = Array.prototype.slice
      var args = slice.apply(arguments)
      // return another fn that can 'delay' application of other args
      return function () {
        return fn.apply(null, args.concat(slice.apply(arguments)))
      }
    }
    // otherwise, just pass along the args in full
    return fn.apply(null, arguments)
  }
}