Use the highest-rank coin to calculate PortfolioSlice

Author: simon-anz

cointop/portfolio.go

@@ -537,9 +537,14 @@ OUTER:
 			continue
 		}
 		// check not already found
+		updateSlice := -1
 		for j := range sliced {
 			if coin.Symbol == sliced[j].Symbol {
-				continue OUTER
+				if coin.Rank >= sliced[j].Rank {
+					continue OUTER // skip updates from lower-ranked coins
+				}
+				updateSlice = j // update this later
+				break
 			}
 		}
 
@@ -551,7 +556,12 @@ OUTER:
 		}
 		balance, _ = strconv.ParseFloat(balancestr, 64)
 		coin.Balance = balance
-		sliced = append(sliced, coin)
+		if updateSlice == -1 {
+			sliced = append(sliced, coin)
+		} else {
+			sliced[updateSlice] = coin
+		}
+
 	}
 
 	sort.Slice(sliced, func(i, j int) bool {