sevkin

// GetFreePort asks the kernel for a free open port that is ready to use.
func GetFreePort() (port int, err error) {
	var a *net.TCPAddr
	if a, err = net.ResolveTCPAddr("tcp", "localhost:0"); err == nil {
		var l *net.TCPListener
		if l, err = net.ListenTCP("tcp", a); err == nil {
			defer l.Close()
			return l.Addr().(*net.TCPAddr).Port, nil
		}
	}

sudo-suhas

pprof

With a single import _ "net/http/pprof" you can add profiling endpoints to a HTTP server.

package main

import (
	"fmt"

bxcodec

/*
This function will help you to convert your object from struct to map[string]interface{} based on your JSON tag in your structs.
Example how to use posted in sample_test.go file.
*/
func structToMap(item interface{}) map[string]interface{} {

	res := map[string]interface{}{}
	if item == nil {
		return res
	}

fpawel

type CartItem = string    
type EmptyState = NoItems 
type PaidForState = { PaidItems : CartItem list; 
                      Payment : decimal}
type ActiveState = { UnpaidItems : CartItem list; }

type Cart = 
    | Empty of EmptyState 
    | Active of ActiveState
    | PaidFor of PaidForState 

r0l1

/* MIT License
 *
 * Copyright (c) 2017 Roland Singer [roland.singer@desertbit.com]
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions: