add: array exercises

14-arrays/exercises/10-hipsters-love-search/main.go

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+// 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
+
+// ---------------------------------------------------------
+// EXERCISE: Hipster's Love Search Engine
+//
+//  Your goal is to let people search for books of Hipster's Love Bookstore.
+//
+//  1. Create an array with these book titles:
+//      Kafka's Revenge
+//      Stay Golden
+//      Everythingship
+//      Kafka's Revenge 2nd Edition
+//
+//  2. Get the search query from the command-line argument
+//
+//  3. Search for the books in the books array
+//
+//  4. When the programs find the book, print it.
+//  5. Otherwise, print that the book doesn't exist.
+//
+//  6. Handle the errors.
+//
+// RESTRICTION:
+//   + The search should be case insensitive.
+//
+// EXPECTED OUTPUT
+//   go run main.go
+//     Tell me a book title
+//
+//   go run main.go STAY
+//     Search Results:
+//     + Stay Golden
+//
+//   go run main.go sTaY
+//     Search Results:
+//     + Stay Golden
+//
+//   go run main.go "Kafka's Revenge"
+//     Search Results:
+//     + Kafka's Revenge
+//     + Kafka's Revenge 2nd Edition
+//
+//   go run main.go void
+//     Search Results:
+//     We don't have the book: "void"
+// ---------------------------------------------------------
+
+func main() {
+}

14-arrays/exercises/10-hipsters-love-search/solution/main.go

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+// 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"
+	"os"
+	"strings"
+)
+
+func main() {
+	books := [4]string{
+		"Kafka's Revenge",
+		"Stay Golden",
+		"Everythingship",
+		"Kafka's Revenge 2nd Edition",
+	}
+
+	args := os.Args[1:]
+	if len(args) != 1 {
+		fmt.Println("Tell me a book title")
+		return
+	}
+	query := strings.ToLower(args[0])
+
+	fmt.Println("Search Results:")
+
+	var found bool
+	for _, v := range books {
+		if strings.Contains(strings.ToLower(v), query) {
+			fmt.Println("+", v)
+			found = true
+		}
+	}
+
+	if !found {
+		fmt.Printf("We don't have the book: %q\n", query)
+	}
+}