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// stringutil 包含有用于处理字符串的工具函数。
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package tools
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// Reverse 将其实参字符串以符文为单位左右反转。
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func Reverse(s string) string {
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r := []rune(s)
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for i, j := 0, len(r)-1; i < len(r)/2; i, j = i+1, j-1 {
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r[i], r[j] = r[j], r[i]
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}
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return string(r)
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}
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