Add examples for the top-level Contains function.

1 files changed, 22 insertions, 0 deletions

diff --git a/examples_test.go b/examples_test.go
index ff1d36e..08eeaf4 100644
--- a/examples_test.go
+++ b/examples_test.go
@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"path/filepath"
 	"regexp"
+	"strings"
 
 	"bitbucket.org/creachadair/stringset"
 )
@@ -108,6 +109,27 @@ func ExampleSet_SymDiff() {
 	// Output: {"b", "t"}
 }
 
+func ExampleContains_slice() {
+	s := strings.Fields("four fine fat fishes fly far")
+	fmt.Println(stringset.Contains(s, "fishes"))
+	// Output:
+	// true
+}
+
+func ExampleContains_map() {
+	s := map[string]int{"apples": 12, "pears": 2, "plums": 0, "cherries": 18}
+	fmt.Println(stringset.Contains(s, "pears"))
+	// Output:
+	// true
+}
+
+func ExampleContains_set() {
+	s := stringset.New("lead", "iron", "copper", "chromium")
+	fmt.Println(stringset.Contains(s, "chromium"))
+	// Output:
+	// true
+}
+
 func ExampleFromKeys() {
 	s := stringset.FromKeys(map[string]int{
 		"one":   1,