80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import (
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"fmt"
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"unicode/utf8"
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)
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func main() {
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strings := []string{
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"cool",
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"güzel",
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"jīntiān",
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"今天",
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"read 🤓",
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}
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for _, s := range strings {
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fmt.Printf("%q\n", s)
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// Print the byte and rune length of the strings
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// Hint: Use len and utf8.RuneCountInString
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fmt.Printf("\thas %d bytes and %d runes\n",
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len(s), utf8.RuneCountInString(s))
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// Print the bytes of the strings in hexadecimal
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// Hint: Use % x verb
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fmt.Printf("\tbytes : % x\n", s)
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// Print the runes of the strings in hexadecimal
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// Hint: Use % x verb
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fmt.Print("\trunes :")
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for _, r := range s {
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fmt.Printf("% x", r)
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}
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fmt.Println()
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// Print the runes of the strings as rune literals
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// Hint: Use for range
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fmt.Print("\trunes :")
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for _, r := range s {
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fmt.Printf("%q", r)
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}
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fmt.Println()
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// Print the first rune and its byte size of the strings
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// Hint: Use utf8.DecodeRuneInString
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r, size := utf8.DecodeRuneInString(s)
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fmt.Printf("\tfirst : %q (%d bytes)\n", r, size)
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// Print the last rune of the strings
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// Hint: Use utf8.DecodeLastRuneInString
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r, size = utf8.DecodeLastRuneInString(s)
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fmt.Printf("\tfirst : %q (%d bytes)\n", r, size)
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// Slice and print the first two runes of the strings
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_, first := utf8.DecodeRuneInString(s)
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_, second := utf8.DecodeRuneInString(s[first:])
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fmt.Printf("\tfirst 2 : %q\n", s[:first+second])
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// Slice and print the last two runes of the strings
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_, last1 := utf8.DecodeLastRuneInString(s)
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_, last2 := utf8.DecodeLastRuneInString(s[:len(s)-last1])
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fmt.Printf("\tlast 2 : %q\n", s[len(s)-last2-last1:])
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// Convert the string to []rune
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// Print the first and last two runes
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rs := []rune(s)
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fmt.Printf("\tfirst 2 : %q\n", string(rs[:2]))
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fmt.Printf("\tlast 2 : %q\n", string(rs[len(rs)-2:]))
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}
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}
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