gg

README

gg

Useful golang utilities.

Documentation

Overview

Package gg is a set of useful golang utilities.

Index

• func If[T any](cond bool, truePart T, falsePart T) T
• func IfFunc[T any](cond bool, truePart func() T, falsePart func() T) T
• func Must[T any](v T, err error) T
• func MustOK(err error)

Examples

• Must
• MustOK

Functions

func If

func If[T any](cond bool, truePart T, falsePart T) T

If returns truePart if cond is true, or returns falsePart. Something like ternary operator in C:

cond ? truePart : falsePart

func IfFunc

func IfFunc[T any](cond bool, truePart func() T, falsePart func() T) T

IfFunc calls truePart() and returns it's return value if cond is true, or calls falsePart() and returns it's return value. If cond is true, falsePart will not be executed. if cond if false, truePart will not be executed. Something like ternary operator in C:

cond ? truePart() : falsePart()

func Must

func Must[T any](v T, err error) T

Must returns v if err is nil, or it panic with err. Must is useful to wrap a function call returning value and error when there is no better way to handle the error other than panicking.

Example

package main

import (
	"fmt"
	"strconv"

	"github.com/mkch/gg"
)

func main() {
	fmt.Print(gg.Must(strconv.Atoi("1")))
}

Output:

1

func MustOK

func MustOK(err error)

MustOK panics if err is not nil.

Example

package main

import (
	"os"

	"github.com/mkch/gg"
)

func main() {
	gg.MustOK(os.Setenv("some_key_for_test", "some value"))
}