fun-with-compose created by josgraha - https://repl.it/NznS/2

fun-with-compose.js

const R = require('ramda');
const { append, compose, filter, flatten, isArray, join, map, prepend } = R
const { log } = console

// html markup functions
const UL = 'ul'

const LI = 'li'

const tagOpen = tag => `<${tag}>`

const tagClose = tag => `</${tag}>`

const tagHoc = tag => compose(
    append(tagClose(tag)),
    prepend(tagOpen(tag))
  )

const toUnorderedList = tagHoc(UL)

const toListItem = compose(join(''), tagHoc(LI))

const newlines = lst => lst.join('\n');

const PHOTO = 'photo'

const VIDEO = 'video'

const media = [
  { name: 'saturday.jpg', type: PHOTO },
  { name: 'sunday.jpg', type: PHOTO },
  { name: 'my.mov', type: VIDEO },
];

const isPhoto = p => p.type == PHOTO;

const itemName = p => p.name

const photoItems = filter(isPhoto)

const itemNames = map(itemName)

// TODO: write a function `toListItems` that returns invokes toListItem for a list of strings 
const toListItems = ???
log(toListItems(['a', 'b', 'c']))
// expected: [ '<li>a</li>', '<li>b</li>', '<li>c</li>' ]

// TODO: write a function `photoNames` that returns the names of the photo items using compose
const photoNames = ???

log(photoNames(media))
// expected: ['saturday.jpg', 'sunday.jpg']

// TODO: write a function `photoListItems` that returns photo names as list items
const photoListItems = ???
log(photoListItems(media))
// expected: [ '<li>saturday.jpg</li>', '<li>sunday.jpg</li>' ]

// TODO: write a function `markup` that composes photoListItems with toUnorderedList with newlines
const markup = ???
log(markup(media))
// expected:
// <ul>
// <li>saturday.jpg</li>
// <li>sunday.jpg</li>
// </ul>