On Sun, Dec 12, 2021 at 5:15 PM Денис Мухортов
<muhortovdeni...@gmail.com> wrote:
> It's a little unclear how os.stdin actually works. Why, if you just run the
> program, is data from stdin constantly being listened to?
> For example:
> func main() {
> sc := bufio.NewScanner(os.Stdin)
> for sc.Scan() {
> txt := sc.Text()
> fmt.Printf("echo: %s\n", txt)
> }
> } But if you send it to stdin ahead of time, the loop will run once and the
> program will exit(echo smth | go run main.go)
There's no difference in those two cases, just try to press ctrl-D in
the terminal. IOW, in both cases the loop loops until stdin reports
EOF.
>From https://pkg.go.dev/bufio#Scanner
""""
Scanning stops unrecoverably at EOF, the first I/O error, or a token
too large to fit in the buffer.
""""
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