柯里化函数

curryfunc.js

function curry(func) {
  var paramLength = func.length,
      args = [];

  return function collectParams () {
    args = args.concat([].slice.call(arguments));

    if (args.length >= paramLength) {
      return func.apply(null, args);
    } else {
      return collectParams;
    }
  }
}

function add(a, b, c) {
  return a + b + c;
}

console.log(curry(add)(1)(2, 3));
console.log(curry(add)(1)(2)(3));