On 01/19/2017 02:00 AM, hui zhang wrote:
> so the file seek does not work in bufio.Read ?
>
It looks like this has been answered before:
https://groups.google.com/forum/#!topic/golang-nuts/mOvX0bmJoeI
You could also create another bufio.Reader after you seek like:
rd := bufio.NewReade
On Wed, 18 Jan 2017 23:00:33 -0800 (PST)
hui zhang wrote:
> so the file seek does not work in bufio.Read ?
You might need to use the Reset() method of your bufio.Reader value
before you reposition the pointer in the underlying opened file.
Please see `go doc bufio.Reader.Reset`.
But this pose
On Wed, 18 Jan 2017 22:54:31 -0800 (PST)
hui zhang wrote:
[...]
> > 2. So we now read the docs on os.File:
> >
> > $ go doc os.File
> >
> >...and see all of its methods there, inclusing Seek().
> >
> > 3. So we read the docs on it:
> >
> > $ go doc os.File.Seek
> >
> thanks all
so the file seek does not work in bufio.Read ?
在 2017年1月19日星期四 UTC+8下午2:59:39，hui zhang写道：
>
> fi.Seek(0, os.SEEK_SET )?
>
>
> I set this in the code and I expected to print 3.13 twice , but this code
> print 3.13 3.14
> why?
>
> package main
>
> import (
>_ "bytes"
>"fmt"
>
fi.Seek(0, os.SEEK_SET )?
I set this in the code and I expected to print 3.13 twice , but this code
print 3.13 3.14
why?
package main
import (
_ "bytes"
"fmt"
_ "math"
"bufio"
"encoding/binary"
"os"
)
func main() {
var pi float64
//b := []byte{0x18, 0x2d, 0
thanks all, I use ide go to definition, it go to the file_unix.go
in this file seek is a private method.
So I am confused
在 2017年1月19日星期四 UTC+8下午2:45:16，Konstantin Khomoutov写道：
>
> On Wed, 18 Jan 2017 22:22:48 -0800 (PST)
> hui zhang > wrote:
>
> [...]
> >fi, err := os.Open("./output.
On Wed, 18 Jan 2017 22:22:48 -0800 (PST)
hui zhang wrote:
[...]
>fi, err := os.Open("./output.bin")
[...]
>fi.seek()?
The usual drill is:
1. Get the documentation on os.Open():
$ go doc os.Open
Notice what it returns in its 1st return value has the
type *File. Sinc
On 01/19/2017 01:22 AM, hui zhang wrote:
> I am using encoding/binary to read/write (struct)data to/from file.
> Some times , I need to seek in the file while reading .
> how to do this in go.
> Check the code below
[snip!]
>
>
> fi, err := os.Open("./output.bin")
>if err != nil {
> pa
I am using encoding/binary to read/write (struct)data to/from file.
Some times , I need to seek in the file while reading .
how to do this in go.
Check the code below
package main
import (
_ "bytes"
"fmt"
_ "math"
"bufio"
"encoding/binary"
"os"
)
func main() {
var pi flo
