Golang不处理2个操作

Question

I'm a new in golang and i don't understand why I can't get next code working:

func ListApps(){
    fmt.Printf("
Press Q to go back..
")
    reader := bufio.NewReader(os.Stdin)
    input, _ := reader.ReadString('
')

    if string(input) == "q" {
        fmt.Printf("OK")
     }
 }

I want to print a message, then scan user's input in console, compare input and print messafe if imput equals string "q". Last check doesn't work for some reasons.

Answer 1

from TFM:

ReadString reads until the first occurrence of delim in the input, returning a string containing the data up to and including the delimiter

You are comparing the string without the delimiter.

So just doing:

if input == "q
" {...}

would work (BTW no need to call string(input) as input is already a string).

Alternatively you can also trim the endline before checking, using strings.TrimRight. This will make the code more portable as it will work on Windows where is used to delimit lines. So do this:

input = strings.TrimRight(input, "
")
if input == "q" {
    fmt.Println("OK")
}

And I've tested this to work myself.