code: function addCamelCasedVersion(obj) {
    const regExp = /(-[a-z])/g
    const replace = str => str[1].toUpperCase()
    const newObj = {}
    for (const key in obj) {
      newObj[key] = obj[key]
      newObj[key.replace(regExp, replace)] = obj[key]
    }
    return newObj
  }
docs: Clones the object and adds a camel cased property version.