foo.js

const R = require('ramda')

const ccompose = (...fs) => {
  let result
  return function r (...args) {
    if (!R.isNil(result)) args = [result, ...args]
    result = fs.shift()(...args)

    if (fs.length === 0) return result
    return r
  }
}

const mergeAndPick = ccompose(R.pick, R.merge)

console.log(mergeAndPick(['bar'], { foo: 'a', bar: 'b' })({ foo: 'x' }))