55 lines
986 B
Go
55 lines
986 B
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"
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)
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func main() {
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s := "Func Values Are Awesome..."
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// s = strings.Map(unicode.ToUpper, s)
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// s = strings.Map(unicode.ToLower, s)
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// s = strings.Map(excite, s)
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// s = strings.Map(calm, s)
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// fmt.Printf("%T\n", strings.Map)
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s = mapx(calm, s)
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fmt.Println(s)
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}
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func mapx(mapping func(rune) rune, s string) string {
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var ns []rune
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for _, r := range s {
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if r = mapping(r); r == -1 {
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continue
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}
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ns = append(ns, r)
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}
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return string(ns)
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}
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func calm(r rune) rune {
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if unicode.IsPunct(r) {
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return -1
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}
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return unicode.ToLower(r)
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}
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func excite(r rune) rune {
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if r == '.' {
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return '!'
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}
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return unicode.ToTitle(r)
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}
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