Essential Go / Working with files and I/O
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package main
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"os"
)
func main() {
path := "main.go"
f, err := os.Open(path)
if err != nil {
log.Fatalf("os.Open() failed with '%s'\n", err)
}
defer f.Close()
d, err := ioutil.ReadAll(f)
if err != nil {
log.Fatalf("ioutil.ReadAll() failed with '%s'\n", err)
}
lines := bytes.Split(d, []byte{'\n'})
fmt.Printf("File %s has %d lines\n", path, len(lines))
}
Go
INFO