Currying - Simple

myProp.js

const myProp = (key, maybeObject) => {
  if (maybeObject === undefined) {
    return (object) => {
      return myProp(key, object)
    }
  }

  return maybeObject[key]
}

myPropCompact.js

const myProp = (key, maybeObject) =>
  maybeObject === undefined
    ? (object) => myProp(key, object)
    : maybeObject[key]

myPropWithRamda.js

const myProp = curry((key, obj) => obj[key])