add: slice exercises

16-slices/exercises/01-declare-nil/main.go

@@ -8,9 +8,9 @@
 package main
 
 // ---------------------------------------------------------
-// EXERCISE: ?
+// EXERCISE: Declare nil slices
 //
-//  1. Declare the following slices:
+//  1. Declare the following slices as nil slices:
 //
 //    1. The names of your friends (names slice)
 //

16-slices/exercises/02-empty/main.go

@@ -10,7 +10,7 @@ package main
 import "fmt"
 
 // ---------------------------------------------------------
-// EXERCISE: ?
+// EXERCISE: Assign empty slices
 //
 //   Assign empty slices to all the slices that you've declared in the previous
 //   exercise, and print them here.

16-slices/exercises/03-slice-literal/main.go

@@ -10,7 +10,7 @@ package main
 import "fmt"
 
 // ---------------------------------------------------------
-// EXERCISE: ?
+// EXERCISE: Assign slice literals
 //
 //   1. Assign the following data using slice literals to the slices that
 //      you've declared in the first exercise.

16-slices/exercises/05-fix-the-problems/main.go

@@ -0,0 +1,57 @@
+// 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: Fix the problems
+//
+//  1. Uncomment the code
+//
+//  2. Fix the problems
+//
+//  3. BONUS: Simplify the code
+//
+//
+// EXPECTED OUTPUT
+//   "Einstein and Shepard and Tesla"
+//   ["Fire" "Kafka's Revenge" "Stay Golden"]
+//   [1 2 3 5 6 7 8 9]
+// ---------------------------------------------------------
+
+func main() {
+	// var names []string
+	// names := []string{}
+	// names = [...]string{
+	// 	"Einstein" "Shepard"
+	// 	"Tesla"
+	// }
+
+	// -----------------------------------
+	// var books []string = [3]string{
+	// 	"Stay Golden",
+	// 	"Fire",
+	// 	"Kafka's Revenge",
+	// }
+
+	// sort.Strings(books)
+
+	// -----------------------------------
+	// // this time, do not change the nums array to a slice
+	// nums := [...]int{5,1,7,3,8,2,6,9}
+
+	// // use the slicing expression to change the nums array to a slice below
+	// sort.Ints(nums)
+
+	// -----------------------------------
+	// Here: Use the strings.Join function to join the names
+	//       (see the expected output)
+	// fmt.Printf("%q\n", names)
+
+	// fmt.Printf("%q\n", books)
+	// fmt.Printf("%d\n", nums)
+}

16-slices/exercises/05-fix-the-problems/solution/main.go

@@ -0,0 +1,28 @@
+// 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"
+	"sort"
+	"strings"
+)
+
+func main() {
+	names := []string{"Einstein", "Shepard", "Tesla"}
+
+	books := []string{"Stay Golden", "Fire", "Kafka's Revenge"}
+	sort.Strings(books)
+
+	nums := [...]int{5, 1, 7, 3, 8, 2, 6, 9}
+	sort.Ints(nums[:])
+
+	fmt.Printf("%q\n", strings.Join(names, " and "))
+	fmt.Printf("%q\n", books)
+	fmt.Printf("%d\n", nums)
+}

16-slices/exercises/06-compare-the-slices/main.go

@@ -0,0 +1,38 @@
+// 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: Compare the slices
+//
+//  1. Split the namesA string and get a slice
+//
+//  2. Sort all the slices
+//
+//  3. Compare whether the slices are equal or not
+//
+//
+// EXPECTED OUTPUT
+//
+//   They are equal.
+//
+//
+// HINTS
+//
+//   1. strings.Split function splits a string and
+//      returns a string slice
+//
+//   2. Comparing slices: First check whether their length
+//      are the same or not; only then compare them.
+//
+// ---------------------------------------------------------
+
+func main() {
+	// namesA := "Da Vinci, Wozniak, Carmack"
+	// namesB := []string{"Wozniak", "Da Vinci", "Carmack"}
+}

16-slices/exercises/06-compare-the-slices/solution/main.go

@@ -0,0 +1,33 @@
+// 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"
+	"sort"
+	"strings"
+)
+
+func main() {
+	namesA := "Da Vinci, Wozniak, Carmack"
+	namesB := []string{"Wozniak", "Da Vinci", "Carmack"}
+
+	namesC := strings.Split(namesA, ", ")
+
+	sort.Strings(namesC)
+	sort.Strings(namesB)
+
+	if len(namesC) == len(namesB) {
+		for i := range namesC {
+			if namesC[i] != namesB[i] {
+				return
+			}
+		}
+		fmt.Println("They are equal.")
+	}
+}

16-slices/exercises/README.md

@@ -0,0 +1,15 @@
+# Slice Exercises
+
+## Exercises Level I - Basics — Warm-Up
+
+1. **[Declare nil slices](https://github.com/inancgumus/learngo/tree/master/16-slices/exercises/01-declare-nil)**
+
+2. **[Assign empty slices](https://github.com/inancgumus/learngo/tree/master/16-slices/exercises/02-empty)**
+
+3. **[Assign slice literals](https://github.com/inancgumus/learngo/tree/master/16-slices/exercises/03-slice-literal)**
+
+4. **[Declare the arrays as slices](https://github.com/inancgumus/learngo/tree/master/16-slices/exercises/04-declare-arrays-as-slices)**
+
+5. **[Fix the Problems](https://github.com/inancgumus/learngo/tree/master/16-slices/exercises/05-fix-the-problems)**
+
+6. **[Compare the slices](https://github.com/inancgumus/learngo/tree/master/16-slices/exercises/06-compare-the-slices)**

x-tba/slices/exercises/README.md

@@ -1,14 +1,41 @@
 # Slice Exercises
 
-// TODO:
+## TODO
-//     + Fix the problem
+* append to slices
-//       -> Don't compare using nil, use the len(s)
+  * append to a nil slice
-//
+  * append to an empty slice
-//   + Compare two slices whether they're equal (using a loop)
-//     + Compare arrays and slices using for loops
-//
-//   + Try to compare a slice to an array
 
+  * check their length — see how they grow
+
+  * fix the problem (forgetten overwriting to the same slice)
+
+  * get arguments from command line and make them uppercase
+  * multiply the numbers
+
+* slicing
+  * slice exercises... n:m.. using len etc..
+  * create a pagination
+  * use the same slice variable
+
+* internals
+  * shared array: implicit/explicit
+  * appending to a nil array
+  * sorts package sorting
+
+  * exercises about capacity
+  * exercises about the mechanics of append
+    * growing
+    * adding elements at the middle etc
+  * exercises about full slice expressions
+
+  * questions:
+    * slice header questions
+    * slice and ask what's the pointer field, len, cap etc
+    * when a new backing array is allocated: nil, empty, no capacity
+    * when to use a full slice expression
+
+
+---
 
 ## Exercises Level I - Basics
 

x-tba/slices/exercises/README2.md

@@ -1,71 +0,0 @@
-# Slice Exercises
-
-## TODO
-* append to slices
-  * append to a nil slice
-  * append to an empty slice
-
-  * check their length — see how they grow
-
-  * fix the problem (forgetten overwriting to the same slice)
-
-  * get arguments from command line and make them uppercase
-  * multiply the numbers
-
-* slicing
-  * slice exercises... n:m.. using len etc..
-  * create a pagination
-  * use the same slice variable
-
-* internals
-  * shared array: implicit/explicit
-  * appending to a nil array
-  * sorts package sorting
-
-  * exercises about capacity
-  * exercises about the mechanics of append
-    * growing
-    * adding elements at the middle etc
-  * exercises about full slice expressions
-
-  * questions:
-    * slice header questions
-    * slice and ask what's the pointer field, len, cap etc
-    * when a new backing array is allocated: nil, empty, no capacity
-    * when to use a full slice expression
-
-
----
-
-## Exercises Level I - Basics
-
-1. **[???](https://github.com/inancgumus/learngo/tree/master/16-slices/exercises/???)**
-
----
-2. **[Get and Set Array Elements](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/02-get-set-arrays)**
-
-3. **[Refactor to Array Literals](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/03-array-literal)**
-
-4. **[Refactor to Ellipsis](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/04-ellipsis)**
-
-5. **[Fix](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/05-fix)**
-
-6. **[Compare the Arrays](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/06-compare)**
-
-7. **[Assign the Arrays](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/07-assign)**
-
----
-
-## Exercises Level II
-
-1. **[Wizard Printer](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/08-wizard-printer)**
-
-2. **[Currency Converter](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/09-currency-converter)**
-
-3. **[Hipster's Bookstore Search Engine](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/10-hipsters-love-search)**
-
-4. **[Find the Average](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/11-average)**
-
-5. **[Number Sorter](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/12-sorter)**
-   
-6. **[Word Finder](https://github.com/inancgumus/learngo/tree/master/14-arrays/exercises/13-word-finder)**