Ramda series

code03.js

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

const players = [{
	id: 1,
	firstName: 'Bnaya',
	age: 55,
	file: {
		img: 'http://foo.bar/bnaya-zil.png'
	}
},
{
	id: 2,
	firstName: 'Leeor',
	age: 10,
	file: {
		img: 'http://foo.bar/leeor-zil.png',
		thumb: 'http://foo.bar/leeor-zil-thumb.png'
	}
}]

const getFile = prop('file')
const getThumb = prop('thumb')
const getImg = prop('img')
const getAge = prop('age')
const getFileContent = juxt([getImg, getThumb])
const reduceFileContent = apply(defaultTo)
const getPlayerPicture = compose(reduceFileContent, getFileContent, getFile)
const getPlayersUnderFifty = filter(compose(gt(50), getAge))
const getPlyersUnderFiftyPicture = compose(map(getPlayerPicture), getPlayersUnderFifty)

const playerPicture = getPlyersUnderFiftyPicture(players) // returns: ['http://foo.bar/leeor-zil.png']