38 lines
547 B
Go
38 lines
547 B
Go
package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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)
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func main() {
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counts := make(map[string]int)
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file := os.Args[1:]
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if len(file) == 0 {
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countLines(os.Stdin, counts)
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} else {
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for _, i := range file {
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f, err := os.Open(i)
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if err != nil {
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log.Print(err)
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}
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countLines(f, counts)
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f.Close()
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}
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}
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for lines, n := range counts {
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if n > 1 {
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fmt.Printf("%d\t%s\n", n, lines)
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}
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}
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}
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func countLines(f *os.File, counts map[string]int) {
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input := bufio.NewScanner(f)
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for input.Scan() {
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counts[input.Text()]++
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}
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}
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