Cash register challenge

[peppeferd]

Hi everybody, im facing with one javascript challenge.
here is the request:
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.
__________________________________________________________________________________________________________________
Here is my actual code:

​

let array = [["ONE HUNDRED", 100],["TWENTY", 20],["TEN", 10],["FIVE", 5],["ONE", 1],["QUARTER", 0.25],["DIME", 0.1],["NICKEL", 0.05],["PENNY", 0.01]];
function checkCashRegister(price, cash, cid) {
   let resto = cash - price;  //x=1355 - 203.54=1151.46
   let ratio100 = resto / 100; // 1151.46 / 100 = 11.5146
   let pezzi100 = parseInt(ratio100) * 100; //11 * 100=1100
   let resto20 = resto - pezzi100; // 1151.46 -1100 = 51.46
   let ratio20= resto20 / 20;    //51.46 / 20= 2.573
   let pezzi20 = parseInt(ratio20) * 20;  // 2 * 20 = 40
   let resto10 = resto - pezzi100 - pezzi20;  //1151.46 - 1100 - 40 =11.46
   let ratio10 = resto10 / 10;  //11.46 / 10 = 1.146
   let pezzi10 = parseInt(ratio10) * 10;  // 1 * 10 = 10
   let resto5 = resto - pezzi100 - pezzi20 - pezzi10;  //1151.46 - 1100 - 40 - 10
   let ratio5 = resto5 / 5;
   let pezzi5 = parseInt(ratio5) * 5;
   let resto1 = resto - pezzi100 - pezzi20 - pezzi10 - pezzi5;
   let ratio1 = resto1 / 1;
   let pezzi1 = parseInt(ratio1) * 1;
   let resto025 = resto - pezzi100 - pezzi20 - pezzi10 - pezzi5 - pezzi1;
   let ratio025 = resto025 / 0.25;
   let pezzi025 = parseInt(ratio025) * 0.25
   let resto01 = resto - pezzi100 - pezzi20 - pezzi10 - pezzi5 - pezzi1 - pezzi025;
   let ratio01 = resto01 / 0.1;
   let pezzi01 = parseInt(ratio01) * 0.1
   let resto005 = resto - pezzi100 - pezzi20 - pezzi10 - pezzi5 - pezzi1 - pezzi025 - pezzi01;
   let ratio005 = resto005 / 0.05;
   let pezzi005 = parseInt(ratio005) * 0.05;
   let resto001 = resto - pezzi100 - pezzi20 - pezzi10 - pezzi5 - pezzi1 - pezzi025 - pezzi01 - pezzi005;
   let ratio001 = resto001 / 0.01;
   let pezzi001 = parseInt(ratio001) * 0.01;

    if (price = cash) {
       var firstObj = { status: "CLOSED", change: cid}
       return firstObj
   }
   else {
      for(let i = 0; i < cid.length; i++) {
        for (let j =0; j < cid[i].length; j++) {
          var sommaCassa = reduce(cid[j])
           if ( sommaCassa > resto && cash < price) {
               array[i].pop()
               array[0].push(pezzi100)
               array[1].push(pezzi20)
               array[2].push(pezzi10)
               array[3].push(pezzi5)
               array[4].push(pezzi1)
               array[5].push(pezzi025)
               array[6].push(pezzi01)
               array[7].push(pezzi005)
               array[8].push(pezzi001)
               var secondObj = { status: "OPEN", change: array }
                return secondObj;
            }
      
        }
 
     if (sommaCassa < resto) {
             var terzoObj = {status: "INSUFFICIENT_FUNDS", change: cid}
             return terzoObj;
          }
   }}}

​

 

[MeMate]

My approach would be something like this

const bills=[[1,'PENNY'],[5,'Nickel'],[10,'DIME'],[25,'QUARTER'],[50,'Half dollar'],[100,'ONE'],[500,'FIVE'],[1000,'TEN'],[2000,'TWENTY'],[10000,'HUNDRED']];
var cid=[[10000,6],[2000,4],[1000,10],[500,4],[100,10],[50,20],[25,50],[10,100],[5,100],[1,260]];
function getBillName(val){
    var b=false;
    for(var i=0; i<bills.length; i++){
        if(bills[i][0]==val){return bills[i][1];}
        }
    return b;
    }
function cashArrayBack(h){
    var n=0;
    var bills='';
    for(var i=0; i<h.length; i++){
        var casher=h[i];
        n+=casher[0]*casher[1];
        bills+=casher[1]+' x '+getBillName(casher[0])+'\t= '+((casher[1]*casher[0])/100)+' USD \n';
    }
    return [n,bills];
}
function currentCashInRegister(){
    return cashArrayBack(cid);
}
function getCashInPennies(ca){
    var n=0;
    for(var i=0; i<ca.length; i++){
        n+=ca[i];
    }
    return n;
}
function pennyBack(array){
    var n=0;
    for(var i=0; i<array.length; i++){n+=array[i];}
    return n;
}
function takeCash(cu,ch){
    var billback=new Array();
    var change=ch;
    var paid=new Array();
    for(var i=0; i<cu.length; i++){
        var a=cu[i];
        var ident=a[0];
        var amount=a[1];
        var po=[ident,0];
        var pennies=ident*amount;
        if(change>0){
            var dif=Math.floor(change/ident);
            if(dif>0 &&  change>0){
                for(var d=0; d<dif; d++){
                    var newP=change-(ident);
                    amount--;
                    if(newP>=0 && amount>=0){
                        po[1]++;
                        cu[i]=[ident,amount];
                        change=newP;
                    }
                }
            }
        }
        if(po[1]){
            paid.push(po);
        }
       
    }
    if(!change){
        console.log('GIVE BACK AS CHANGE');
        var t=cashArrayBack(paid);
        console.log(t[0]/100+' USD in Total\n'+t[1]);
        return cu;
    }else{
        console.log('NOT ENOUGH CHANGE IN REGISTER. '+(change/100)+' USD MISSING');
        return false;
    }
}
function addCash(cu,ca){
        for(var i=0; i<cu.length; i++){
            if(cu[i][0]==ca){cu[i][1]++;}
        }
        return cu;
}
function buy(cu,pr,ca){
        var paid=pennyBack(ca);
        var change=(paid-pr);
        console.log('CHANGE '+(change/100)+' USD = '+change+' pennies');
        if(change>=0){
        for(var i=0; i<ca.length; i++){
            cu=addCash(cu,ca[i]);
            }
            cu=takeCash(cu,change);
            if(cu){
            cid=cu;
            return 'OKAY CHANGE SHOULD BE '+(change/100)+' USD';
            }else{
                return 'Sorry, cash register ran out of change';
                }
        }else{
            return 'Hey Bagger Vance!! '+Math.abs(change/100)+' Dollars more for this!!!!';
            }
}

function purchaseSomething(price,cash){
   
    console.log('----------------------------------------------------------------------------\nBuy something for '+(price/100)+' USD and pay with '+(pennyBack(cash)/100)+' USD');
    for(var i=0; i<cash.length; i++){
        console.log(getBillName(cash[i])+' USD BILL ');
        }
   
    var status=buy(cid,price,cash);
    console.log('STATUS '+status);
}


console.log(bills);
console.log(cid);
console.log('Bills and coins in cash register');
var cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);


purchaseSomething(5128,[10000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);


purchaseSomething(150,[10,10,100,25,10]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);


purchaseSomething(53,[2000,2000,2000,2000,2000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);


purchaseSomething(5128,[2000,2000,2000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);


purchaseSomething(9999,[2000,2000,2000,2000,2000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);


purchaseSomething(5128,[100]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);

purchaseSomething(5128,[10000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);

purchaseSomething(1,[10000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);

purchaseSomething(5128,[10000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);


purchaseSomething(5128,[10000]);
console.log('Bills and coins in cash register');
cus=currentCashInRegister();
console.log(cus[0]/100+' USD in Total\n'+cus[1]);

purchaseSomething expects to arguments
1) Price in Pennies
2) Array of Bills (e.g, [100,50,10] for [DOLLAR,HALF DOLLAR,DIME]

It will return the change sorted by type and sort of bill (paper or metal)
Also it tries to keep small change as long as possible.

 

[peppeferd]

Thank you, after i did it by my own.