Actually, it is even possible that not even a new slice header is created
in this case, but I did not check.
On Thu, Jan 18, 2018 at 3:56 PM Bruno Albuquerque <b...@bug-br.org.br> wrote:
> It creates a new slice header, but the backing array is not copied.
>
> On Thu, Jan 18, 2018 at 3:35 PM Peng Yu <pengyu...@gmail.com> wrote:
>
>> Dan & Bruno,
>>
>> I didn't realize that it is as simple as that :) Thanks.
>>
>> Does it involve any extra copy of the byte slice? Or f.Write literally
>> access the memory of d and only access 2 bytes of data for writing to
>> the buffer?
>>
>> On Thu, Jan 18, 2018 at 5:13 PM, Dan Kortschak
>> <dan.kortsc...@adelaide.edu.au> wrote:
>> > If you want to write a length shorter than the slice, make the slice
>> > shorter. No, seriously...
>> >
>> > n, err := f.Write(d[:2])
>> >
>> > On Thu, 2018-01-18 at 17:04 -0600, Peng Yu wrote:
>> >> Hi,
>> >>
>> >> The following example shows how to write a byte slice to a buffer.
>> >> But
>> >> what if I want only write a length shorter (say 2 instead of 5) than
>> >> the size of the slice. Is there a function that allows users to
>> >> specify the length to write? Thanks.
>> >>
>> >> $ cat main.go
>> >> #!/usr/bin/env gorun
>> >> // vim: set noexpandtab tabstop=2:
>> >> package main
>> >>
>> >> import (
>> >> "os"
>> >> "bufio"
>> >> "fmt"
>> >> )
>> >>
>> >> func main() {
>> >> f := bufio.NewWriter(os.Stdout)
>> >> d := []byte{'s', 'o', 'm', 'e', '\n'}
>> >> n, err := f.Write(d)
>> >> f.Flush()
>> >> fmt.Printf("wrote %d bytes, error %q\n", n, err)
>> >> }
>> >>
>> >> --
>> >> Regards,
>> >> Peng
>> >>
>>
>>
>>
>> --
>> Regards,
>> Peng
>>
>
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