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30 lines
628 B
Go
30 lines
628 B
Go
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// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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// See page 305.
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//!+
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// Package word provides utilities for word games.
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package word
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import "unicode"
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// IsPalindrome reports whether s reads the same forward and backward.
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// Letter case is ignored, as are non-letters.
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func IsPalindrome(s string) bool {
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var letters []rune
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for _, r := range s {
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if unicode.IsLetter(r) {
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letters = append(letters, unicode.ToLower(r))
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}
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}
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for i := range letters {
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if letters[i] != letters[len(letters)-1-i] {
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return false
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}
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}
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return true
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}
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//!-
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