https://blog.youkuaiyun.com/weixin_34329187/article/details/91396617
function currying(fn) {
let args_arr = [], max_length = fn.length
let closure = function (...args) {
// 先把参数加进去
args_arr = args_arr.concat(args)
// 如果参数没满,返回闭包等待下一次调用
if (args_arr.length < max_length) return closure
// 传递完成,执行
return fn(...args_arr)
}
return closure
}
function add(x, y, z) {
return x + y + z
}
curriedAdd = currying(add)
console.log(curriedAdd(1, 2)(3))