golang扫描器读取直到读取器结尾

Question

I have a bufio scanner on a StringReader. After I reach a certain line on the Scanner output, I want to read until the end of the reader. Is there any way to achieve this using a simpler way, other than the commented code ?

s := `1
2
3
4
5
6
7`

beyond5 := ""
scanner := bufio.NewScanner(strings.NewReader(s))
for scanner.Scan() {
    if strings.Contains(scanner.Text(), "5") {
        // Read all lines until EOF from scanner
        // and store in beyond5
        // for scanner.Scan() {
        //  beyond5 += scanner.Text()
        //  beyond5 += "
"
        // }
        break
    }
}

log.Println(beyond5)

Answer 1

It seems such an operation is not possible at all with the scanner. We need to use the bufio reader only. The code is:

s := `1
2
3
4
5
6
7`

beyond5 := ""
r := strings.NewReader(s)
reader := bufio.NewReader(r)
for {
    line, err := reader.ReadString('
')
    if err != nil {
        log.Fatal(err)
    }
    if strings.Contains(line, "5") {
        b, _ := ioutil.ReadAll(reader)
        beyond5 = string(b)
        break
    }
}

log.Println(beyond5)