函数柯里化

函数柯里化

/**
 * 函数柯里化
 * @param fn
 * @param args
 * @return {Function}
 */
function curry(fn, args = []) {
  return function () {
    let rest = [...args, ...arguments];
    if (rest.length < fn.length) {
      return curry.call(this, fn, rest);
    } else {
      return fn.apply(this, rest);
    }
  };
}
// 测试代码
function sum(a, b, c) {
  return a + b + c;
}
let sumFn = curry(sum);
console.log(sumFn(1)(2)(3));
console.log(sumFn(1)(2, 3));