Strings and Text¶

str := "hello"
c := []rune(str)
c[0] = 'c'
s2 := string(c) // s2 == "cello"

// gives only the bytes:
for i:=0; i < len(str); i++ {
  ... = str[i]
}
// gives the Unicode characters:
for ix, ch := range str {
  ...
}

utf8.RuneCountInString(str)

len([]int(str))

// with a bytes.Buffer
var buffer bytes.Buffer
var s string
buffer.WriteString(s)
fmt.Print(buffer.String(), "\n")

s := []string{"foo", "bar", "baz"}
fmt.Println(strings.Join(s, ", ")) // foo, bar, baz

str1 += str2 // using += operator

package main

import "fmt"

func reverse(s string) string {
    runes := []rune(s)
    n := len(runes)
    mid := n / 2

    for i := 0; i < mid; i++ {
        runes[i], runes[n-1-i] = runes[n-1-i], runes[i]
    }

    return string(runes)
}

func main() {
    // reverse a string:
    str := "the quick brown 狐 jumped over the lazy 犬"

    fmt.Printf("The reversed string using variant is: `%s`\n", reverse(str))
}

package main

import (
    "fmt"
    "math/rand"
)

const letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

func randSeq(n int) string {
    b := make([]byte, n)
    for i := range b {
        b[i] = letters[rand.Intn(len(letters))]
    }
    return string(b)
}

func main() {
    fmt.Println(randSeq(10)) // e.g. irIXkcjdon
}