From a1877bcd5f7ca652d8914988811a3150a8fc59b1 Mon Sep 17 00:00:00 2001
From: Steven Degutis <steven.degutis@gmail.com>
Date: Fri, 16 Mar 2012 07:17:07 -0500
Subject: [PATCH] varargs

---
 about_variadic_functions.go | 20 ++++++++++++++++++++
 setup_koans_test.go         |  4 ++--
 2 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 about_variadic_functions.go

diff --git a/about_variadic_functions.go b/about_variadic_functions.go
new file mode 100644
index 0000000..c6f74ff
--- /dev/null
+++ b/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
+  }
+}
diff --git a/setup_koans_test.go b/setup_koans_test.go
index 03f9b10..cec612f 100644
--- a/setup_koans_test.go
+++ b/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()