added zip to gitignore

.gitignore

@@ -8,6 +8,7 @@
 *.dll
 *.so
 *.dylib
+*.zip
 
 # Test binary, built with `go test -c`
 *.test

answer.txt

@@ -1,46 +0,0 @@
-UPC
-200033148770
-200042041350
-200042041400
-200042064910
-200047796200
-200059594110
-200059660970
-200065290180
-200065290220
-200065290310
-200065290340
-200065290370
-200066707320
-200069556670
-200072791220
-0075849385857
-200072791320
-200072791380
-200072791470
-200072950140
-200079186270
-200079343740
-200081451640
-200081630310
-200106953220
-200156488680
-200157056340
-200168095820
-200168979440
-200172490020
-200177334550
-200177780700
-200177788230
-327582805540
-337582889920
-357582840140
-357582843530
-357582850030
-477039522210
-477039522200
-482000077030
-482000077040
-482000077090
-647582802920
-647582804700

main.go

@@ -71,6 +71,7 @@ func main() {
 		}))
 
 	for _, upc := range upcs {
+		if len(upc) > 0 {
 			checkForNonStartingNumber := regex.MatchString(upc)
 
 			if checkForNonStartingNumber {
@@ -78,7 +79,7 @@ func main() {
 				continue
 			}
 
-		if isNumeric(upc) == true {
+			if isNumeric(upc) {
 				gtins = append(gtins, upc)
 				continue
 			}
@@ -111,6 +112,10 @@ func main() {
 
 			gtins = append(gtins, upc)
 			checkBar.Add(1)
+		} else {
+			gtins = append(gtins, "")
+			checkBar.Add(1)
+		}
 	}
 
 	answerBar := progressbar.NewOptions(len(gtins),