javascript 拉姆达系列

Posted 2021-05-04

import {prop, compose, apply, defaultTo, juxt} from 'ramda'

const player = {
	id: 1,
	name: 'Bnaya',
	file: {
		img: 'http://foo.bar/bnaya-zil.png'
	}
}

const getFile = prop('file')
const getThumb = prop('thumb')
const getImg = prop('img')
const getFileContent = juxt([getImg, getThumb])
const reduceFileContent = apply(defaultTo)
const getPlayerPicture = compose(reduceFileContent, getFileContent, getFile)

const playerPicture = getPlayerPicture(player) // returns: 'http://foo.bar/bnaya-zil.png'