对javascript函数返回带有多个粗箭头的多个函数感到困惑 [英] Confused about javascript function returning multiple functions with many fat arrow

问题描述

我的CS作业有问题. 我需要访问该函数的x值，但是我的代码向我返回了一个空函数，而不是带有值的

I have problem with my cs homework. I need to access the x value of the function, but my codes is returning me an empty function instead of with the values

我已经用Google搜索了所有的currying和closes，但是它们都不先进，足以帮助我解决问题

I have googled all the currying and closures, but none of them are advanced enough to help me solve my problem

const pair = (x, y) => f => f(x, y);  // Do not edit this function
const head = p => //Answer here                

console.log(head(pair(1,2)))          // Do not edit this

当我尝试所有组合时，我的控制台会不断返回我functions

my console keeps returning me functions instead when I try all the combinations

function(a,b){return a;}

推荐答案

您可以像这样更改head函数:

You could change head function like this:

const pair = (x, y) => f => f(x, y); 
const head = f => f(a => a)

console.log(head(pair(1,2)))

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