varargs

about_variadic_functions.go

@@ -0,0 +1,20 @@
+package go_koans
+
+import "strings"
+
+func concatNames(sep string, names ...string) string {
+  return strings.Join(names, sep) // variadic parameters are really just slices
+}
+
+func testVariadicFunctions() {
+  {
+    str := concatNames(" ", "bob", "billy", "fred")
+    assert(str == __string__) // several values can be passed to variadic parameters
+  }
+
+  {
+    names := []string{"bob", "billy", "fred"}
+    str := concatNames("-", names...)
+    assert(str == __string__) // or a slice can be dotted in place of all of them
+  }
+}

setup_koans_test.go

@@ -23,11 +23,11 @@ func TestKoans(t *testing.T) {
   //testSlices()
   //testControlFlow()
   //testEnumeration()
-  testAnonymousFunctions()
+  //testAnonymousFunctions()
+  testVariadicFunctions()
 
   // TODO: ie, gameplan
   //testFiles()
-  //testVariadicFunctions()
   //testInterfaces()
   //testMaps()
   //testStructs()