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Diffstat (limited to 'src/strings/example_test.go')
| -rw-r--r-- | src/strings/example_test.go | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/strings/example_test.go b/src/strings/example_test.go new file mode 100644 index 000000000..7243e16b1 --- /dev/null +++ b/src/strings/example_test.go @@ -0,0 +1,225 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package strings_test + +import ( + "fmt" + "strings" + "unicode" +) + +func ExampleFields() { + fmt.Printf("Fields are: %q", strings.Fields(" foo bar baz ")) + // Output: Fields are: ["foo" "bar" "baz"] +} + +func ExampleFieldsFunc() { + f := func(c rune) bool { + return !unicode.IsLetter(c) && !unicode.IsNumber(c) + } + fmt.Printf("Fields are: %q", strings.FieldsFunc(" foo1;bar2,baz3...", f)) + // Output: Fields are: ["foo1" "bar2" "baz3"] +} + +func ExampleContains() { + fmt.Println(strings.Contains("seafood", "foo")) + fmt.Println(strings.Contains("seafood", "bar")) + fmt.Println(strings.Contains("seafood", "")) + fmt.Println(strings.Contains("", "")) + // Output: + // true + // false + // true + // true +} + +func ExampleContainsAny() { + fmt.Println(strings.ContainsAny("team", "i")) + fmt.Println(strings.ContainsAny("failure", "u & i")) + fmt.Println(strings.ContainsAny("foo", "")) + fmt.Println(strings.ContainsAny("", "")) + // Output: + // false + // true + // false + // false +} + +func ExampleCount() { + fmt.Println(strings.Count("cheese", "e")) + fmt.Println(strings.Count("five", "")) // before & after each rune + // Output: + // 3 + // 5 +} + +func ExampleEqualFold() { + fmt.Println(strings.EqualFold("Go", "go")) + // Output: true +} + +func ExampleIndex() { + fmt.Println(strings.Index("chicken", "ken")) + fmt.Println(strings.Index("chicken", "dmr")) + // Output: + // 4 + // -1 +} + +func ExampleIndexFunc() { + f := func(c rune) bool { + return unicode.Is(unicode.Han, c) + } + fmt.Println(strings.IndexFunc("Hello, 世界", f)) + fmt.Println(strings.IndexFunc("Hello, world", f)) + // Output: + // 7 + // -1 +} + +func ExampleIndexAny() { + fmt.Println(strings.IndexAny("chicken", "aeiouy")) + fmt.Println(strings.IndexAny("crwth", "aeiouy")) + // Output: + // 2 + // -1 +} + +func ExampleIndexRune() { + fmt.Println(strings.IndexRune("chicken", 'k')) + fmt.Println(strings.IndexRune("chicken", 'd')) + // Output: + // 4 + // -1 +} + +func ExampleLastIndex() { + fmt.Println(strings.Index("go gopher", "go")) + fmt.Println(strings.LastIndex("go gopher", "go")) + fmt.Println(strings.LastIndex("go gopher", "rodent")) + // Output: + // 0 + // 3 + // -1 +} + +func ExampleJoin() { + s := []string{"foo", "bar", "baz"} + fmt.Println(strings.Join(s, ", ")) + // Output: foo, bar, baz +} + +func ExampleRepeat() { + fmt.Println("ba" + strings.Repeat("na", 2)) + // Output: banana +} + +func ExampleReplace() { + fmt.Println(strings.Replace("oink oink oink", "k", "ky", 2)) + fmt.Println(strings.Replace("oink oink oink", "oink", "moo", -1)) + // Output: + // oinky oinky oink + // moo moo moo +} + +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 ", "")) + fmt.Printf("%q\n", strings.Split("", "Bernardo O'Higgins")) + // Output: + // ["a" "b" "c"] + // ["" "man " "plan " "canal panama"] + // [" " "x" "y" "z" " "] + // [""] +} + +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) + // Output: + // ["a" "b,c"] + // [] (nil = true) +} + +func ExampleSplitAfter() { + fmt.Printf("%q\n", strings.SplitAfter("a,b,c", ",")) + // Output: ["a," "b," "c"] +} + +func ExampleSplitAfterN() { + fmt.Printf("%q\n", strings.SplitAfterN("a,b,c", ",", 2)) + // Output: ["a," "b,c"] +} + +func ExampleTitle() { + fmt.Println(strings.Title("her royal highness")) + // Output: Her Royal Highness +} + +func ExampleToTitle() { + fmt.Println(strings.ToTitle("loud noises")) + fmt.Println(strings.ToTitle("хлеб")) + // Output: + // LOUD NOISES + // ХЛЕБ +} + +func ExampleTrim() { + fmt.Printf("[%q]", strings.Trim(" !!! Achtung! Achtung! !!! ", "! ")) + // Output: ["Achtung! Achtung"] +} + +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...")) + // Output: 'Gjnf oevyyvt naq gur fyvgul tbcure... +} + +func ExampleTrimSpace() { + fmt.Println(strings.TrimSpace(" \t\n a lone gopher \n\t\r\n")) + // Output: a lone gopher +} + +func ExampleNewReplacer() { + r := strings.NewReplacer("<", "<", ">", ">") + fmt.Println(r.Replace("This is <b>HTML</b>!")) + // Output: This is <b>HTML</b>! +} + +func ExampleToUpper() { + fmt.Println(strings.ToUpper("Gopher")) + // Output: GOPHER +} + +func ExampleToLower() { + fmt.Println(strings.ToLower("Gopher")) + // Output: gopher +} + +func ExampleTrimSuffix() { + var s = "Hello, goodbye, etc!" + s = strings.TrimSuffix(s, "goodbye, etc!") + s = strings.TrimSuffix(s, "planet") + fmt.Print(s, "world!") + // Output: Hello, world! +} + +func ExampleTrimPrefix() { + var s = "Goodbye,, world!" + s = strings.TrimPrefix(s, "Goodbye,") + s = strings.TrimPrefix(s, "Howdy,") + fmt.Print("Hello" + s) + // Output: Hello, world! +} |