publish variadic functions. also, spelling

@@ -11,7 +11,7 @@ Maps
 Range
 Functions
 Multiple Return Values
-# Varadic Functions
+Variadic Functions
 Closures
 Recursion
 # Defer

@@ -3,5 +3,5 @@ $ go run multiple-return-values.go
 7
 7
 
-# Another key aspect of functions in Go is their ability
-# to form closures, which we'll look at next.
+# Accepting a variable number of arguments is another nice
+# feature of Go functions; we'll look at this next.

@@ -25,7 +25,7 @@ func main() {
     fmt.Println(getRep)
     fmt.Println(getStr)
 
-    // varadic calls
+    // variadic calls
     client.Set("foo1", "bar1")
     client.Set("foo2", "bar2")
     client.Set("foo3", "bar3")

@@ -1,31 +0,0 @@
-// Varadic functions can be called with any number of
-// trailing arguments. This is useful if you don't know
-// number of arguments that will be needed for a function
-// ahead of time.
-
-package main
-
-import "fmt"
-
-// Varadic args are declared with `...type` and
-// passed in as a slice.
-func add(nums ...int) int {
-    fmt.Print(nums, " ")
-    total := 0
-    for _, num := range nums {
-        total += num
-    }
-    return total
-}
-
-func main() {
-    // Varadic functions can be called in the usual way.
-    fmt.Println(add(1, 2))
-    fmt.Println(add(1, 2, 3))
-
-    // If you already have multiple args in a slice,
-    // apply them to a varadic function using `
-    // func(slice...)`.                              
-    nums := []int{1, 2, 3, 4}
-    fmt.Println(add(nums...))
-}

@@ -1,4 +0,0 @@
-$ go run varadic-functions.go
-[1 2] 3
-[1 2 3] 6
-[1 2 3 4] 10

@@ -0,0 +1,33 @@
+// [_Variadic functions_](http://en.wikipedia.org/wiki/Variadic_function)
+// can be called with any number of trailing arguments.
+// For example, `fmt.Println` is a common variadic
+// function.
+
+package main
+
+import "fmt"
+
+// Here's a function that will take an arbitrary number
+// of `ints` as arguments.
+func sum(nums ...int) int {
+    fmt.Print(nums, " ")
+    total := 0
+    for _, num := range nums {
+        total += num
+    }
+    return total
+}
+
+func main() {
+
+    // Variadic functions can be called in the usual way
+    // with individual arguments.
+    fmt.Println(sum(1, 2))
+    fmt.Println(sum(1, 2, 3))
+
+    // If you already have multiple args in a slice,
+    // apply them to a variadic function using
+    // `func(slice...)` like this.
+    nums := []int{1, 2, 3, 4}
+    fmt.Println(sum(nums...))
+}

@@ -0,0 +1,7 @@
+$ go run variadic-functions.go 
+[1 2] 3
+[1 2 3] 6
+[1 2 3 4] 10
+
+# Another key aspect of functions in Go is their ability
+# to form closures, which we'll look at next.