Free Code Camp JavaScript Project 5 - Cash Register
Design a cash register drawer function checkCashRegister() that accepts purchase price as the first argument (price), payment as the second argument (cash), and cash-in-drawer (cid) as the third argument.
cid is a 2D array listing available currency.
The checkCashRegister() function should always return an object with a status key and a change key.
Return {status: "INSUFFICIENT_FUNDS", change: []} if cash-in-drawer is less than the change due, or if you cannot return the exact change.
Return {status: "CLOSED", change: [...]} with cash-in-drawer as the value for the key change if it is equal to the change due.
Otherwise, return {status: "OPEN", change: [...]}, with the change due in coins and bills, sorted in highest to lowest order, as the value of the change key.
Remember to use Read-Search-Ask if you get stuck. Try to pair program. Write your own code.
Currency Unit Amount Penny $0.01 (PENNY) Nickel $0.05 (NICKEL) Dime $0.1 (DIME) Quarter $0.25 (QUARTER) Dollar $1 (DOLLAR) Five Dollars $5 (FIVE) Ten Dollars $10 (TEN) Twenty Dollars $20 (TWENTY) One-hundred Dollars $100 (ONE HUNDRED)
First thoughts on how to solve:
// get the difference between the purchase price and the cash given by the client: delta_x = cash - price; // run a for loop that iterates through a currencyUnitArray, starting with "One-hundred Dollars" (100) and ending with "Penny" (0.01) // run an "if" statement checking if Math.floor(delta_x/currencyUnitArray[i]) > 1 // if true: currencyAmmountRequired = Math.floor(delta_x/currencyUnitArray[i]) * currencyUnitArray[i] if(currencyAmmountRequired > cid[i][1]){ // use the ammount available in the cash register (cid[i][1]) // push this to the change array i.e. ["TWENTY", 60] // delta_x - cid[i][1] }else // use delta_x - currencyAmmountRequired
// if false: increment "i" and check again