JS Currying Example

js-currying-example.js

function curry(func) {
    return function curried(...args) {
      if (args.length >= func.length) {
        return func.apply(this, args);
      } else {
        return function(...args2) {
          return curried.apply(this, args.concat(args2));
        }
      }
    }
  }

// transform your function w/ curry()
const message = curry((date, type, message) => {
     return `${type} : ${message} : ${date}`
})

// now "type" and "date" aren't needed for any proceeding calls.
// next call to errorMessage will only affect the 3rd arg, "message"
const errorMessage = message(new Date(), 'error')


// use curried message 
console.log(errorMessage('There was a problem'))

// not use curry message
console.log(message(new Date(), 'error', "There was a problem"))