Function: compose()
ts
function compose<T>(...funcs): (arg) => T;Composes multiple functions into a single function that executes from right to left. 将多个函数组合成一个从右到左执行的单一函数。
Function composition allows you to chain operations together, where the output of one function becomes the input of the next function. 函数组合允许您将操作链接在一起，其中一个函数的输出成为下一个函数的输入。
Type Parameters
| Type Parameter | Description |
|---|---|
T | The type of the input and output value / 输入和输出值的类型 |
Parameters
| Parameter | Type | Description |
|---|---|---|
...funcs | (arg) => T[] | An array of functions to compose / 要组合的函数数组 |
Returns
A new function that executes the input functions from right to left / 从右到左执行输入函数的新函数
(arg) => T
Example
typescript
const add1 = (x) => x + 1
const multiply2 = (x) => x * 2
const square = (x) => x * x
// square(multiply2(add1(3))) = square(multiply2(4)) = square(8) = 64
const composed = compose(square, multiply2, add1)
composed(3) // => 64
const addExclamation = (s) => s + '!'
const toUpperCase = (s) => s.toUpperCase()
const addPrefix = (s) => 'RESULT: ' + s
const transform = compose(addPrefix, toUpperCase, addExclamation)
transform('hello') // => "RESULT: HELLO!"Since
1.0.0