function compose(...funcs) {
if (funcs.length === 0) {
return arg => arg
}
if (funcs.length === 1) {
return funcs[0]
}
return funcs.reduce((a, b) => (...args) => a(b(...args)))
}
let a = (c) => c * c
let b = (x) => x + x
compose(a, b)(1)
// 4
因為 compose(a, b)(1) 會變為 a(b(1))
export default function withRules(ruleOptions = {}) {
return Component =>
class WithRules extends React.Component {
render() {
return (
<Component>
....
</Component>
)
}
}
}
(opt) => (BaseComponent) => return class