Currying and Compose

将参数转化为函数

const curriedMultiply = (a) => (b) => a * b;
const multiplyBy5 = curriedMultiply(5);

接受函数作为参数，后面的函数为前面的函数的参数

const compose = (f, g) => (a) => f(g(a));

const sum = (num) => num + 1;

compose(sum, sum)(5); 结果为7