add: new tictactoe game

add: testing to tictactoe

rename: tictactoe

add: tictactoe steps

refactor: tictactoe const names

refactor: tictactoe loop

add: tictactoe bad switch example (fallthrough)

refactor: tictactoe loop skin

remove: tictactoe changable skin

refactor: tictactoe all

remove: tictactoe unnecessary base dir

add: tictactoe slices

add: tictactoe slices

remove: tictactoe fallthrough

rename: tictactoe slices 10 -> 09

update: loops skin tictactoe

add: tictactoe randomization

add: tictactoe infinite loop and labeled break

refactor: tictactoe rand and infinite loop

add: tictactoe buggy winning algo

add: tictactoe more tests

rename: tictactoe wrongPlay to wrongMove

add: tictactoe even more tests

fix: tictactoe

rename: tictactoe waitForInput to wait

add: tictactoe os.args gameSpeed

remove: tictactoe unnecessary files

rename: tictactoe game messages

refactor: tictactoe main loop

add: types and arrays

x-tba/foundations/lookup/main.go

@@ -0,0 +1,70 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"strings"
+)
+
+const (
+	missingHost = "Please provide at least one domain. --help for more information."
+
+	help = `
+Host to IP Lookup:
+------------------
+
+It finds the ip addresses of the given hosts. You can provide hosts by separating them with spaces.
+
+Example:
+
+  host google.com
+  host google.com uber.com`
+)
+
+func main() {
+	// url := "google.com"
+	var message string
+
+	args := os.Args
+	switch l := len(args); {
+	// case len(args) == 1:
+	case l == 1:
+		message = missingHost
+	case l == 2 && args[1] == "--help":
+		message = strings.TrimSpace(help)
+	}
+
+	if message != "" {
+		fmt.Println(message)
+		return
+	}
+
+	// for i := 0; i < len(args); i++ {}
+	// for i, url := range args {
+	for _, url := range args[1:] {
+		// if i == 0 {
+		// 	continue
+		// }
+
+		ips, err := net.LookupIP(url)
+		if err != nil {
+			fmt.Printf("%-20s => %s\n", url, err)
+			// break
+			continue
+		}
+
+		for _, ip := range ips {
+			if ip = ip.To4(); ip != nil {
+				fmt.Printf("%-20s => %s\n", url, ip)
+			}
+		}
+	}
+}