add: exercises and quiz for appending and slicing

16-slices/exercises/13-slicing-basics/main.go

@@ -0,0 +1,54 @@
+package main
+
+// ---------------------------------------------------------
+// EXERCISE: Slice the numbers
+//
+//   We've a string that contains even and odd numbers.
+//
+//   1. Convert the string to an []int
+//
+//   2. Print the slice
+//
+//   3. Slice it for the even numbers and print it (assign it to a new slice variable)
+//
+//   4. Slice it for the odd numbers and print it (assign it to a new slice variable)
+//
+//   5. Slice it for the two numbers at the middle
+//
+//   6. Slice it for the first two numbers
+//
+//   7. Slice it for the last two numbers (use the len function)
+//
+//   8. Slice the evens slice for the last one number
+//
+//   9. Slice the odds slice for the last two numbers
+//
+//
+// EXPECTED OUTPUT
+//   go run main.go
+//
+//     nums        : [2 4 6 1 3 5]
+//     evens       : [2 4 6]
+//     odds        : [1 3 5]
+//     middle      : [6 1]
+//     first 2     : [2 4]
+//     last 2      : [3 5]
+//     evens last 1: [6]
+//     odds last 2 : [4 6]
+//
+//
+// NOTE
+//
+//  You can also use my prettyslice package for printing the slices.
+//
+//
+// HINT
+//
+//  Find a function in the strings package for splitting the string into []string
+//
+// ---------------------------------------------------------
+
+func main() {
+	// uncomment the declaration below
+	// data := "2 4 6 1 3 5"
+}

16-slices/exercises/13-slicing-basics/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"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	data := "2 4 6 1 3 5"
+	splitted := strings.Fields(data)
+
+	var nums []int
+	for _, s := range splitted {
+		n, _ := strconv.Atoi(s)
+		nums = append(nums, n)
+	}
+
+	// rest of the code for this exercise
+	fmt.Println("nums        :", nums)
+
+	evens, odds := nums[:3], nums[3:]
+
+	fmt.Println("evens       :", evens)
+	fmt.Println("odds        :", odds)
+
+	fmt.Println("middle      :", nums[2:4])
+	fmt.Println("first 2     :", nums[:2])
+	fmt.Println("last 2      :", nums[len(nums)-2:])
+
+	fmt.Println("evens last 1:", evens[len(evens)-1:])
+	fmt.Println("odds last 2 :", evens[len(evens)-2:])
+}