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https://github.com/gopl-zh/gopl-zh.github.com.git
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45 lines
864 B
Go
45 lines
864 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 72.
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// Basename1 reads file names from stdin and prints the base name of each one.
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package main
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import (
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"bufio"
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"fmt"
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"os"
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)
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func main() {
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input := bufio.NewScanner(os.Stdin)
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for input.Scan() {
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fmt.Println(basename(input.Text()))
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}
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// NOTE: ignoring potential errors from input.Err()
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}
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//!+
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// basename removes directory components and a .suffix.
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// e.g., a => a, a.go => a, a/b/c.go => c, a/b.c.go => b.c
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func basename(s string) string {
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// Discard last '/' and everything before.
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for i := len(s) - 1; i >= 0; i-- {
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if s[i] == '/' {
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s = s[i+1:]
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break
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}
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}
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// Preserve everything before last '.'.
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for i := len(s) - 1; i >= 0; i-- {
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if s[i] == '.' {
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s = s[:i]
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break
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}
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}
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return s
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}
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//!-
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