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os: add example for OpenFile

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New beginners are not familiar with open(2)-style masking of the
flags. Add an example demonstrates the flag or'ing.

Change-Id: Ifa8009c55173ba0dc6642c1d3b3124c766b1ebbb
Reviewed-on: https://go-review.googlesource.com/27996
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Jaana Burcu Dogan 2016-08-28 23:11:00 -07:00
parent 650c2c173d
commit 428d79bd38
1 changed files with 20 additions and 0 deletions
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20
src/os/example_test.go Normal file
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// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package os_test
import (
"log"
"os"
)
func ExampleOpenFile() {
f, err := os.OpenFile("notes.txt", os.O_RDWR|os.O_CREATE, 0755)
if err != nil {
log.Fatal(err)
}
if err := f.Close(); err != nil {
log.Fatal(err)
}
}