Not printing series of variable in golang-CodePudding

I'm learning Golang got some weird output using go v1.18 when I print firstName, lastName, birthday, created only got result as created I have printed declaring variable and printing whole thing again it works fine the problem is with var reader = bufio.NewReader(os.Stdin)

package main

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

var reader = bufio.NewReader(os.Stdin)

func main() {
    firstName := getUserData("Enter First Name: ")
    lastName := getUserData("Enter Last Name: ")
    birthdate := getUserData("Enter Date of Birth: ")
    created := time.Now()

    fmt.Println(firstName, lastName, birthdate, created) //only prints created
    fmt.Println(firstName) // prints firstName
    fmt.Println(lastName) // prints lastName
    fmt.Println(birthdate) // prints birthdate
    fmt.Println(created) // prints created
}

func getUserData(promptText string) string {
    fmt.Print(promptText)
    userInput, _ := reader.ReadString('\n')
    cleanedInput := strings.Replace(userInput, "\n", "", -1)
    return cleanedInput
}

CodePudding user response：

you have to use strings.TrimSpace instead of strings.Replace because in your code you did not remove the Carriage return \r

See the corrected code below.

package main

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

var reader = bufio.NewReader(os.Stdin)

func main() {
    firstName := getUserData("Enter First Name: ")
    lastName := getUserData("Enter Last Name: ")
    birthdate := getUserData("Enter Date of Birth: ")
    created := time.Now()

    fmt.Println(firstName, lastName, birthdate, created) //will print all
    fmt.Println(firstName)                               // prints firstName
    fmt.Println(lastName)                                // prints lastName
    fmt.Println(birthdate)                               // prints birthdate
    fmt.Println(created)                                 // prints created
}

func getUserData(promptText string) string {
    fmt.Print(promptText)
    userInput, _ := reader.ReadString('\n')
    cleanedInput := strings.TrimSpace(userInput)

    return cleanedInput
}