Golang Print Placeholders

Table of Contents

Lessons learned from `Learn Go with Tests` - This article is part of a series.

Part 1: Lessons learned from `Learn Go with Tests`

Part 2: This Article

Part 3: Testing in Golang

Part 4: Golang Functions

Part 5: Golang Variables

Part 6: Golang Concurrency

Part 7: Golang Context

Part 8: Golang Structs

A few sprintf placeholders that I’ve found handy coding in golang.

%q placeholder
#

%q placeholder formats strings

package main

import (
  "fmt"
)

func main() {
  fmt.Println(fmt.Sprintf("%q", "tralala"))
}

"tralala"

%t placeholder
#

The %t formats booleans

package main

import (
  "fmt"
)

func main() {
  fmt.Println(fmt.Sprintf("%t", true))
}

true

`%#v` placeholder
#

%#v is a nice way to echo structs

package main

import (
  "fmt"
)

type someStruct struct {
  someValue int
}

func main() {
  fmt.Println(fmt.Sprintf("%#v", someStruct{someValue: 3}))
}

main.someStruct{someValue:3}