CODE EXAMPLE FOR JAVASCRIPT

why use currying

const createURL = baseURL => {
  const protocol = "https";

  // we now return a function, that accepts a 'path' as an argument
  return path => {
    return `${protocol}://${baseURL}/${path}`;
  };
};

// we create a new functions with the baseURL value in it's closure scope
const createSiteURL = createURL("mysite.com");
const createCareersURL = createURL("mysite-careers.com");

// create URLs for our main site
const homeURL = createSiteURL("");
const loginURL = createSiteURL("login");
const productsURL = createSiteURL("products");
const contactURL = createSiteURL("contact-us");

// create URLs for our career site
const careersHomeURL = createCareersURL("");
const careersLoginURL = createCareersURL("login");