How to Strip Newline Characters from a String in Golang

strip_newline.go

package main

import (
        "fmt"
        "strings"
)

func main() {

        var string_a string = "My super \nsweet \nstring has \nmany newline\n characters"

        fmt.Println(string_a)

        var string_b string = string_a

        string_b = strings.Replace(string_b, "\n", "", -1)

        fmt.Println(string_b)
}

Equally:
strings.ReplaceAll(string_b, "\n", "")

if you're looking to remove padding from the end of your string there's strings.TrimRight(string_b, "\r\n") where each character in that list will be removed.

also, super nitpicky but the convention for variables in Go is camelCase not snake_case.

There's also strings.TrimSuffix(string_b, "\r\n").

In my case tough, can't seem to trim the newline at the end of command output from cat on a file.

@daluu

In my case tough, can't seem to trim the newline at the end of command output from cat on a file.

TrimSuffix requires all characters in the correct order to be present.
if the file only has \n, then \r\n wont be trimmed because those 2 characters dont exist

files will contain only \n if they're created on linux or macos or wsl
they will have both \r\n characters if they're created on windows

what you want is strings.TrimRight(string_b, "\r\n"), it removes any individual character from the end of the string.
if there is just \n, it removes it, and if there's \r\n it removes both