终端输入与预期结果不符

Question

I am new to Go.

I wrote the program below to allow a user to enter the name.

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {
    reader := bufio.NewReader(os.Stdin)

    fmt.Print("Enter name:")
    name, err := reader.ReadString('
')
    if err != nil {
        panic(err)
    }

    fmt.Println(name == "nixon")
}

I ran the program and entered my name nixon

Why is it that the output of fmt.Println(name == "nixon") is always false?

Answer 1

func (*Reader) ReadString

func (b *Reader) ReadString(delim byte) (string, error)

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

---

name terminal input includes trailing newlines. For example,

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {
    reader := bufio.NewReader(os.Stdin)

    fmt.Print("Enter name:")
    name, err := reader.ReadString('
')
    if err != nil {
        panic(err)
    }
    fmt.Printf("%q
", name)

    fmt.Println(name == "nixon")
}

Output (Linux):

Enter name:nixon
"nixon
"
false

Output (Windows):

Enter name:nixon
"nixon
"
false

---

Trim trailing newlines. For example,

package main

import (
    "bufio"
    "fmt"
    "os"
    "strings"
)

func main() {
    reader := bufio.NewReader(os.Stdin)

    fmt.Print("Enter name:")
    name, err := reader.ReadString('
')
    if err != nil {
        panic(err)
    }
    fmt.Printf("%q
", name)
    name = strings.TrimRight(name, "
")
    fmt.Printf("%q
", name)

    fmt.Println(name == "nixon")

}

Output (Linux):

Enter name:nixon
"nixon
"
"nixon"
true

Output (Windows):

Enter name:nixon
"nixon
"
"nixon"
true