从直观上理解柯里化，就是原本需要一次传 n 个参数才可以执行一个函数，
柯里化后我可以每次只传一个单独的参数来运行一个函数
例子 1：
把特定的函数柯里化
1
2
3
|
// 把add(1, 2, 3) 变成curriedAdd(1)(2)(3)，这就是函数柯里化
const curriedAdd = (a) => (b) => (c) => add(a, b, c)
|
例子 2:
做一个柯里化其他函数的函数
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
addTwo = (a, b) => a + b
addThree = (a, b, c) => a + b + c
addFour = (a, b, c, d) => a + b + c + d
const currify = (fn, params = []) => {
return (arg) => {
const newParams = params.concat(arg)
if (newParams.length === fn.length) {
return fn(...newParams)
} else {
return currify(fn, newParams)
}
}
}
console.log(currify(addTwo)(1)(2)) //3
console.log(currify(addThree)(1)(2)(3)) //6
console.log(currify(addFour)(1)(2)(3)(4)) //10
|
例子 3：
做一个柯里化其他函数的函数（参数个数可以不限制为 1）
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
|
addFour = (a, b, c, d) => a + b + c + d
const currify = (fn, params = []) => {
return (...args) => {
const newParams = params.concat(...args)
if (newParams.length === fn.length) {
return fn(...newParams)
} else {
return currify(fn, newParams)
}
}
}
console.log(currify(addFour)(1, 2, 3, 4)) //10
console.log(currify(addFour)(1, 2, 3)(4)) //10
console.log(currify(addFour)(1, 2)(3, 4)) //10
console.log(currify(addFour)(1)(2, 3)(4)) //10
|
