package

.gitignore

@@ -43,3 +43,4 @@ datediff/datediff
 example-json/example-json
 financialjson/financialjson
 statecsv2json/statecsv2json
+converter-main/converter-main

converter-main/main.go

@@ -0,0 +1,16 @@
+package main
+
+import "fmt"
+import "log"
+import "os"
+import "meutel.net/meutel/go-examples/converter"
+
+func main() {
+	if len(os.Args) < 3 {
+		log.Fatalln("Needs 2 arguments")
+	}
+	input := os.Args[1]
+	convTo := os.Args[2]
+
+	fmt.Println(converter.Convert(input, convTo))
+}

converter/converter.go

@@ -1,8 +1,7 @@
-package main
+package converter
 
 import "fmt"
 import "log"
-import "os"
 import "strconv"
 import "strings"
 
@@ -23,13 +22,7 @@ var (
 	convVal float64
 )
 
-func main() {
-	if len(os.Args) < 3 {
-		log.Fatalln("Needs 2 arguments")
-	}
-	input := os.Args[1]
-	convTo := os.Args[2]
-
+func Convert(input, convTo string) string {
 	switch {
 	case strings.HasSuffix(input, markerKm):
 		inUnit = markerKm
@@ -58,8 +51,6 @@ func main() {
 		asMeter = inVal
 	}
 
-	// fmt.Println(inVal, inUnit, asMeter, convTo)
-
 	switch convTo {
 	case markerMiles:
 		convVal = asMeter / (MilesToKm * 1000)
@@ -72,5 +63,6 @@ func main() {
 	default:
 		log.Fatalln("Invalid unit: " + convTo)
 	}
-	fmt.Printf("%.2f%s\n", convVal, convTo)
+
+	return fmt.Sprintf("%.2f%s", convVal, convTo)
 }