缓存函数,curry与偏函数

vue中体现缓存函数，用以下代码解释

function cached(fn){
  const cache = Object.create(null)
  return (function cachedFn(str){
     const hit = cache[str]

    return hit || (cache[str] = fn(str))
  })
}

const capitable = cached(function(str){
   return str.charAt(0).toUpperCase() + str.slice(1)
})

capitable(camplizedId)

curry柯里化

https://zhuanlan.zhihu.com/p/112505577

https://zhuanlan.zhihu.com/p/149587276

https://www.zhihu.com/question/394062839/answer/1496127786

https://blog.csdn.net/jhzhahuaiyu/article/details/83143591递归优化