strings: add a example for Compare func

Add a example for string.Compare that return the three possible results.

Change-Id: I103cf39327c1868fb249538d9e22b11865ba4b70
Reviewed-on: https://go-review.googlesource.com/49011
Reviewed-by: Heschi Kreinick <heschi@google.com>

diff --git a/src/strings/example_test.go b/src/strings/example_test.go
index d9e31ea770484562a2e1f1881cc79e01dc28fd73..473b8c38339ae527420bc3ae694304f1ece2903c 100644 (file)
--- a/src/strings/example_test.go
+++ b/src/strings/example_test.go
@@ -23,6 +23,16 @@ func ExampleFieldsFunc() {
        // Output: Fields are: ["foo1" "bar2" "baz3"]
 }
 
+func ExampleCompare() {
+       fmt.Println(strings.Compare("a", "b"))
+       fmt.Println(strings.Compare("a", "a"))
+       fmt.Println(strings.Compare("b", "a"))
+       // Output:
+       // -1
+       // 0
+       // 1
+}
+
 func ExampleContains() {
        fmt.Println(strings.Contains("seafood", "foo"))
        fmt.Println(strings.Contains("seafood", "bar"))