JavaScript if-else และ try-catch ให้เป็นรูปแบบ Functional

index.js

const condition = (funcExec) =>  (props) => {
    return funcExec.if(props) ? funcExec.then(props) : funcExec.else(props)
}

const priceChangeUpdate = (rating) => rating > 3;

const dataRatingCar = (car) => {
   const carDB = {
   'honda' : () => 5,
   'toyota' : () => 3,
   'nissan' : () => 2.5      
   }
   return carDB[car]()
}

const calculatePriceFromRating = condition({
  if :  priceChangeUpdate,
  then : rating => 1000000 * rating,
  else :  () => 890000
})



const getCarConfig = (car) => {
   return {
      newPrice : calculatePriceFromRating(dataRatingCar(car))
   }
}

const carListUpdate =  ['honda' , 'toyota' , 'nissan'].map( car => getCarConfig(car) )
console.log("carListUpdate :: " , carListUpdate)




ref : https://www.techstarthailand.com/blog/detail/JavaScript-if-else-and-try-catch-as-functional-constructs/1005?fbclid=IwAR1wG-N0SRRNVD-9JkloDLJifY6TnWV-kmb08_Nmlyv21cWBSQJ5BLLJVxE