update: lucky number game and its exercises

13-loops/02-project-lucky-number-game/02-game/main.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	maxTurns = 5 // less is more difficult
-	usage    = `Welcome to the Lucky Number Game!
+	usage    = `Welcome to the Lucky Number Game! 🍀
 
 The program will pick %d random numbers.
 Your mission is to guess one of those numbers.
@@ -50,7 +50,7 @@ func main() {
 		return
 	}
 
-	for turn := 1; turn <= maxTurns; turn++ {
+	for turn := 0; turn < maxTurns; turn++ {
 		n := rand.Intn(guess + 1)
 
 		if n == guess {

13-loops/exercises/02-lucky-number-exercises/01-first-turn-winner/solution/main.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	maxTurns = 5 // less is more difficult
-	usage    = `Welcome to the Lucky Number Game!
+	usage    = `Welcome to the Lucky Number Game! 🍀
 
 The program will pick %d random numbers.
 Your mission is to guess one of those numbers.

13-loops/exercises/02-lucky-number-exercises/02-random-messages/solution/main.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	maxTurns = 5 // less is more difficult
-	usage    = `Welcome to the Lucky Number Game!
+	usage    = `Welcome to the Lucky Number Game! 🍀
 
 The program will pick %d random numbers.
 Your mission is to guess one of those numbers.
@@ -49,7 +49,7 @@ func main() {
 		return
 	}
 
-	for turn := 1; turn <= maxTurns; turn++ {
+	for turn := 0; turn < maxTurns; turn++ {
 		n := rand.Intn(guess + 1)
 
 		if n == guess {

13-loops/exercises/02-lucky-number-exercises/03-double-guesses/solution/main.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	maxTurns = 5 // less is more difficult
-	usage    = `Welcome to the Lucky Number Game!
+	usage    = `Welcome to the Lucky Number Game! 🍀
 
 The program will pick %d random numbers.
 Your mission is to guess one of those numbers.
@@ -63,7 +63,7 @@ func main() {
 		min = guess2
 	}
 
-	for turn := 1; turn <= maxTurns; turn++ {
+	for turn := 0; turn < maxTurns; turn++ {
 		n := rand.Intn(min + 1)
 
 		if n == guess || n == guess2 {

13-loops/exercises/02-lucky-number-exercises/04-verbose-mode/solution/main.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	maxTurns = 5 // less is more difficult
-	usage    = `Welcome to the Lucky Number Game!
+	usage    = `Welcome to the Lucky Number Game! 🍀
 
 The program will pick %d random numbers.
 Your mission is to guess one of those numbers.

13-loops/exercises/02-lucky-number-exercises/05-enough-picks/solution/main.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	maxTurns = 5 // less is more difficult
-	usage    = `Welcome to the Lucky Number Game!
+	usage    = `Welcome to the Lucky Number Game! 🍀
 
 The program will pick %d random numbers.
 Your mission is to guess one of those numbers.
@@ -54,9 +54,8 @@ func main() {
 		min = guess
 	}
 
-	for turn := 1; turn <= maxTurns; turn++ {
+	for turn := 0; turn < maxTurns; turn++ {
 		n := rand.Intn(min + 1)
-		fmt.Println(n)
 
 		if n == guess {
 			fmt.Println("🎉  YOU WIN!")

13-loops/exercises/02-lucky-number-exercises/06-dynamic-difficulty/solution/main.go

@@ -17,7 +17,7 @@ import (
 
 const (
 	maxTurns = 5 // less is more difficult
-	usage    = `Welcome to the Lucky Number Game!
+	usage    = `Welcome to the Lucky Number Game! 🍀
 
 The program will pick %d random numbers.
 Your mission is to guess one of those numbers.

13-loops/exercises/03-word-finder-exercises/02-path-searcher/main.go

@@ -14,23 +14,22 @@ package main
 //  variable.
 //
 //  Remove the corpus constant then get the corpus from the
-//  environment variable "Path" or "PATH" which
-//  constains paths to the executable programs on your
-//  operating system.
+//  environment variable "Path" or "PATH".
 //
 // HINTS
-//  1. Search the web for what is an environment
-//     variable and how to use it, if you don't know
-//     what it is.
+//  1. Search the web to find out what is an environment
+//     variable and how to use it (if you don't know
+//     what it is already).
 //
-//  2. Look up for the necessary function for getting
+//  2. Look up for the necessary functions for getting
 //     an environment variable. It's in the "os" package.
 //
 //     Search for it on the Go online documentation.
 //
 //  3. Look up for the necessary function for splitting
-//     the path variable into directories. It's in
-//     the "strings" package.
+//     the path variable into directory names.
+//
+//     It's in the "path/filepath" package.
 //
 // EXAMPLE
 //  For example, on my Mac, my PATH environment variable
@@ -53,17 +52,30 @@ package main
 //  the path environment variable when you run it on
 //  a Windows or on a Mac (OS X) or on a Linux.
 //
-// HINT
-//  1. What you're looking for is the runtime.GOOS constant.
-//  2. Get the operating system name using GOOS.
-//  3. Adjust the path environment variable name and
-//     the directory separator accordingly.
+// BONUS EXERCISE #2
+//  Also find the directories for the directories that
+//  contains the searched query.
 //
-//  FOR EXAMPLE: On OS X, path environment variable's name
-//    is PATH and the separator is a colon `:`.
+//  And let it match in a case-insensitive manner. See the examples.
 //
-//  Or, on Windows, its name is Path and the separator is
-//    a semicolon `;`.
+//  EXAMPLE:
+//    Let's say:
+//      PATH="/usr/local/bin:/sbin:/Users/inanc/go/bin"
+//
+//  So, if the user runs the program like this:
+//    go run main.go bin
+//
+//  It should print this:
+//    #1 : "/usr/local/bin"
+//    #2 : "/sbin"
+//    #3 : "/Users/inanc/go/bin"
+//
+//  Or like this (case insensitive):
+//    go run main.go Us
+//
+//  Output:
+//    #1 : "/usr/local/bin"
+//    #2 : "/Users/inanc/go/bin"
 // ---------------------------------------------------------
 
 func main() {

13-loops/exercises/03-word-finder-exercises/02-path-searcher/solution/main.go

@@ -10,26 +10,38 @@ package main
 import (
 	"fmt"
 	"os"
+	"path/filepath"
 	"strings"
 )
 
+const notFound = -1
+
 func main() {
-	// get and split the PATH environment variable
-	// this only works for the unix-based systems
-	words := strings.Split(os.Getenv("PATH"), ":")
+	// Get and split the PATH environment variable
+
+	// SplitList function automatically finds the
+	// separator for the path env variable
+	words := filepath.SplitList(os.Getenv("PATH"))
+
+	// Alternative way, but above one is better:
+	// words := strings.Split(
+	// 	os.Getenv("PATH"),
+	// 	string(os.PathListSeparator))
+
 	query := os.Args[1:]
-queries:
+
 	for _, q := range query {
 	search:
 		for i, w := range words {
+			q, w = strings.ToLower(q), strings.ToLower(w)
+
 			switch q {
 			case "and", "or", "the":
 				break search
 			}
 
-			if q == w {
+			if strings.Index(w, q) != notFound {
 				fmt.Printf("#%-2d: %q\n", i+1, w)
-				continue queries
 			}
 		}
 	}