Move common code into new package, 'common'

common/common.go

@@ -0,0 +1,30 @@
+package common
+
+import "fmt"
+
+// Appends the appendee to the array if it does not contain appendee yet
+func AppendIfUnique(appendee string, array []string) []string {
+	// Iterate over all elements and check values
+	for _, elem := range array {
+		if elem == appendee {
+			// ... found. Stop here
+			return array
+		}
+	}
+
+	// None found, append
+	return append(array, appendee)
+}
+
+// Prints each element, along with a small ASCII tree
+func PrintTree(strarr []string) {
+	// iterate over each element
+	for iter, elem := range strarr {
+		// check if we got the last element
+		if iter < len(strarr) - 1 {
+			fmt.Printf("|- %s\n", elem)
+		} else {
+			fmt.Printf("'- %s\n\n", elem)
+		}
+	}
+}