strings: more examples

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5645092

src/pkg/strings/example_test.go

@@ -13,3 +13,158 @@ import (
 func ExampleFields() {
 	fmt.Printf("Fields are: %q", strings.Fields("  foo bar  baz   "))
 }
+
+// true
+// false
+// true
+// true
+func ExampleContains() {
+	fmt.Println(strings.Contains("seafood", "foo"))
+	fmt.Println(strings.Contains("seafood", "bar"))
+	fmt.Println(strings.Contains("seafood", ""))
+	fmt.Println(strings.Contains("", ""))
+}
+
+// false
+// true
+// false
+// false
+func ExampleContainsAny() {
+	fmt.Println(strings.ContainsAny("team", "i"))
+	fmt.Println(strings.ContainsAny("failure", "u & i"))
+	fmt.Println(strings.ContainsAny("foo", ""))
+	fmt.Println(strings.ContainsAny("", ""))
+
+}
+
+// 3
+// 5
+func ExampleCount() {
+	fmt.Println(strings.Count("cheese", "e"))
+	fmt.Println(strings.Count("five", "")) // before & after each rune
+}
+
+// true
+func ExampleEqualFold() {
+	fmt.Println(strings.EqualFold("Go", "go"))
+}
+
+// 4
+// -1
+func ExampleIndex() {
+	fmt.Println(strings.Index("chicken", "ken"))
+	fmt.Println(strings.Index("chicken", "dmr"))
+}
+
+// 4
+// -1
+func ExampleRune() {
+	fmt.Println(strings.IndexRune("chicken", 'k'))
+	fmt.Println(strings.IndexRune("chicken", 'd'))
+}
+
+// 0
+// 3
+// -1
+func ExampleLastIndex() {
+	fmt.Println(strings.Index("go gopher", "go"))
+	fmt.Println(strings.LastIndex("go gopher", "go"))
+	fmt.Println(strings.LastIndex("go gopher", "rodent"))
+}
+
+// foo, bar, baz
+func ExampleJoin() {
+	s := []string{"foo", "bar", "baz"}
+	fmt.Println(strings.Join(s, ", "))
+}
+
+// banana
+func ExampleRepeat() {
+	fmt.Println("ba" + strings.Repeat("na", 2))
+}
+
+// oinky oinky oink
+// moo moo moo
+func ExampleReplace() {
+	fmt.Println(strings.Replace("oink oink oink", "k", "ky", 2))
+	fmt.Println(strings.Replace("oink oink oink", "oink", "moo", -1))
+}
+
+// ["a" "b" "c"]
+// ["" "man " "plan " "canal panama"]
+// [" " "x" "y" "z" " "]
+func ExampleSplit() {
+	fmt.Printf("%q\n", strings.Split("a,b,c", ","))
+	fmt.Printf("%q\n", strings.Split("a man a plan a canal panama", "a "))
+	fmt.Printf("%q\n", strings.Split(" xyz ", ""))
+}
+
+// ["a" "b,c"]
+// [] (nil = true)
+func ExampleSplitN() {
+	fmt.Printf("%q\n", strings.SplitN("a,b,c", ",", 2))
+	z := strings.SplitN("a,b,c", ",", 0)
+	fmt.Printf("%q (nil = %v)\n", z, z == nil)
+}
+
+// ["a," "b," "c"]
+func ExampleSplitAfter() {
+	fmt.Printf("%q\n", strings.SplitAfter("a,b,c", ","))
+}
+
+// ["a," "b,c"]
+func ExampleSplitAfterN() {
+	fmt.Printf("%q\n", strings.SplitAfterN("a,b,c", ",", 2))
+}
+
+// Her Royal Highness
+func ExampleTitle() {
+	fmt.Println(strings.Title("her royal highness"))
+}
+
+// LOUD NOISES
+// ХЛЕБ
+func ExampleToTitle() {
+	fmt.Println(strings.ToTitle("loud noises"))
+	fmt.Println(strings.ToTitle("хлеб"))
+}
+
+// [Achtung]
+func ExampleTrim() {
+	fmt.Printf("[%s]", strings.Trim(" !!! Achtung !!! ", "! "))
+}
+
+// 'Gjnf oevyyvt naq gur fyvgul tbcure...
+func ExampleMap() {
+	rot13 := func(r rune) rune {
+		switch {
+		case r >= 'A' && r <= 'Z':
+			return 'A' + (r-'A'+13)%26
+		case r >= 'a' && r <= 'z':
+			return 'a' + (r-'a'+13)%26
+		}
+		return r
+	}
+	fmt.Println(strings.Map(rot13, "'Twas brillig and the slithy gopher..."))
+}
+
+// a lone gopher
+func ExampleTrimSpace() {
+	fmt.Println(strings.TrimSpace(" \t\n a lone gopher \n\t\r\n"))
+}
+
+// This is &lt;b&gt;HTML&lt;/b&gt;!
+func ExampleNewReplacer() {
+	r := strings.NewReplacer("<", "&lt;", ">", "&gt;")
+	fmt.Println(r.Replace("This is <b>HTML</b>!"))
+}
+
+// GOPHER
+func ExampleToUpper() {
+	fmt.Println(strings.ToUpper("Gopher"))
+}
+
+// gopher
+func ExampleToLower() {
+	fmt.Println(strings.ToLower("Gopher"))
+}