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Comments (3)

kingstone3 avatar kingstone3 commented on May 22, 2024 8

hello,这个例子:

function currying(fn, length) {
  length = length || fn.length; 	// 注释 1
  return function (...args) {			// 注释 2
    return args.length >= length	// 注释 3
    	? fn.apply(this, args)			// 注释 4
      : currying(fn.bind(this, ...args), length - args.length) // 注释 5
  }
}

// Test
const fn = currying(function(a, b, c) {
    console.log([a, b, c]);
});

fn("a", "b", "c") // ["a", "b", "c"]
fn("a", "b")("c") // ["a", "b", "c"]
fn("a")("b")("c") // ["a", "b", "c"]
fn("a")("b", "c") // ["a", "b", "c"]

可以不用在递归 currying 的时候传入 length - args.length,因为 bind 返回的函数的 length 已经是 length - args.length 了:

    function currying(fn) {
      return function (...args) {
        return args.length >= fn.length
          ? fn.apply(this, args)
          : currying(fn.bind(this, ...args))
      }
    }

from blog.

txw2018 avatar txw2018 commented on May 22, 2024

太难了

from blog.

1gehunzi avatar 1gehunzi commented on May 22, 2024

看不懂啊 被自己蠢死

from blog.

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