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// 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!
}
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