add: more content to structs

x-tba/2-structs/01-basics-part-i/main.go

@@ -1,65 +0,0 @@
-// 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"
-
-func main() {
-	/*
-		USING VARIABLES
-	*/
-
-	// var (
-	// 	name, lastname string
-	// 	age            int
-	// )
-	//
-	// name, lastname = "Pablo", "Picasso"
-	// age = 95
-	//
-	// name2, lastname2 := "Sigmund", "Freud"
-	// age2 := 83
-	//
-	// fmt.Println("Picasso:", name, lastname, age)
-	// fmt.Println("Freud  :", name2, lastname2, age2)
-
-	/*
-		USING STRUCT VARIABLES
-	*/
-
-	// // declare a struct variable
-	// var picasso struct {
-	// 	name, lastname string
-	// 	age            int
-	// }
-
-	// create a new struct type
-	type person struct {
-		name, lastname string
-		age            int
-	}
-
-	// short-declare struct variable without field names
-	// you cannot omit values when you initialize without field names
-	picasso := person{
-		name:     "Pablo",
-		lastname: "Picasso",
-		age:      95,
-	}
-
-	// short-declare struct variable with field names
-	// omitted fields will be zeroed
-	freud := person{
-		name:     "Sigmund",
-		lastname: "Freud",
-		age:      83,
-	}
-
-	fmt.Printf("Picasso: %#v\n\n", picasso)
-	fmt.Printf("Freud  : %#v\n\n", freud)
-}

x-tba/2-structs/01-intro/main.go

@@ -0,0 +1,51 @@
+// 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"
+
+func main() {
+	type Movie struct {
+		Title  string
+		Genre  string
+		Rating int
+	}
+
+	type Rental struct {
+		Address string
+		Rooms   int
+		Size    int
+		Price   int
+	}
+
+	type Person struct {
+		Name     string
+		Lastname string
+		Age      int
+	}
+
+	person1 := Person{Name: "Pablo", Lastname: "Picasso", Age: 91}
+	person2 := Person{Name: "Sigmund", Lastname: "Freud", Age: 83}
+
+	fmt.Printf("person1: %+v\n", person1)
+	fmt.Printf("person2: %+v\n", person2)
+
+	type VideoGame struct {
+		Title     string
+		Genre     string
+		Published bool
+	}
+
+	pacman := VideoGame{
+		Title:     "Pac-Man",
+		Genre:     "Arcade Game",
+		Published: true,
+	}
+
+	fmt.Printf("pacman: %+v\n", pacman)
+}

x-tba/2-structs/02-basics-part-ii/main.go

@@ -1,53 +0,0 @@
-// 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"
-
-func main() {
-	// create a new struct type
-	type person struct {
-		name, lastname string
-		age            int
-	}
-
-	picasso := person{"Pablo", "Picasso", 95}
-	freud := person{name: "Sigmund", lastname: "Freud", age: 83}
-
-	// picasso.age++
-	// picasso.name = "Master"
-
-	master := picasso
-	// var master person
-	// master.name = picasso.name
-	// master.lastname = picasso.lastname
-	// master.age = picasso.age
-
-	master = freud
-	master.name = "Master"
-	master.age++
-
-	for _, p := range []person{picasso, freud, master} {
-		if p == picasso {
-			// if p.name == picasso.name &&
-			// 	p.lastname == picasso.lastname &&
-			// 	p.age == picasso.age {
-
-			// p is a copy
-			p.name = "Raphael"
-
-			fmt.Printf("%s's age is %d\n", p.name, p.age)
-		}
-	}
-
-	// Picasso is still the same
-	fmt.Printf("\n%s's age is %d\n", picasso.name, picasso.age)
-
-	// type team struct{ scores []int }
-	// _ = team{} == team{}
-}

x-tba/2-structs/02-basics/main.go

@@ -0,0 +1,63 @@
+// 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"
+
+func main() {
+	/*
+		USING VARIABLES
+	*/
+
+	var (
+		name, lastname string
+		age            int
+
+		name2, lastname2 string
+		age2             int
+	)
+
+	name, lastname, age = "Pablo", "Picasso", 95
+	name2, lastname2, age = "Sigmund", "Freud", 83
+
+	fmt.Println("Picasso:", name, lastname, age)
+	fmt.Println("Freud  :", name2, lastname2, age2)
+
+	// var picasso struct {
+	// 	name, lastname string
+	// 	age            int
+	// }
+
+	// var freud struct {
+	// 	name, lastname string
+	// 	age            int
+	// }
+
+	// create a new struct type
+	type person struct {
+		name, lastname string
+		age            int
+	}
+
+	// picasso := person{name: "Pablo", lastname: "Picasso", age: 91}
+	picasso := person{
+		name:     "Pablo",
+		lastname: "Picasso",
+		age:      91,
+	}
+
+	var freud person
+	freud.name = "Sigmund"
+	freud.lastname = "Freud"
+	freud.age = 83
+
+	fmt.Printf("\n%s's age is %d\n", picasso.lastname, picasso.age)
+
+	fmt.Printf("\nPicasso: %#v\n", picasso)
+	fmt.Printf("Freud  : %#v\n", freud)
+}

x-tba/2-structs/03-compare-assign/main.go

@@ -0,0 +1,94 @@
+// 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"
+
+// #1b: create the song struct type
+type song struct {
+	title, artist string
+}
+
+// #5: structs can contain other structs
+type playlist struct {
+	genre string
+
+	// songTitles []string
+	// songArtist []string
+
+	// #6: include a slice of song structs
+	songs []song
+}
+
+func main() {
+	// #1: create two struct values with the same type
+	song1 := song{title: "wonderwall", artist: "oasis"}
+	song2 := song{title: "super sonic", artist: "oasis"}
+
+	fmt.Printf("song1: %+v\nsong2: %+v\n", song1, song2)
+
+	// #4: structs are copied
+	// song1 = song2
+
+	// #3: structs can be compared
+	if song1 == song2 {
+		// #2: struct comparison works like this
+		// if song1.title == song2.title &&
+		// 	song1.artist == song2.artist {
+		fmt.Println("songs are equal.")
+	} else {
+		fmt.Println("songs are not equal.")
+	}
+
+	// #8
+	songs := []song{
+		// #7b: you don't have to type the element types
+		{title: "wonderwall", artist: "oasis"},
+		{title: "radioactive", artist: "imagine dragons"},
+	}
+
+	// #7: a struct can include another struct
+	rock := playlist{
+		genre: "indie rock",
+		songs: songs,
+	}
+
+	// #9: you can't compare struct values that contains incomparable fields
+	// you need to compare them manually
+
+	// clone := rock
+	// if rock.songs == clone {
+	// }
+	// if songs == songs {
+
+	// #11: song is a clone, it cannot change the original struct value
+	song := rock.songs[0]
+	song.title = "live forever"
+
+	// #11c: directly set the original one
+	rock.songs[0].title = "live forever"
+
+	// #11b
+	fmt.Printf("\n%+v\n%+v\n", song, rock.songs[0])
+
+	// #10: printing
+	fmt.Printf("\n%-20s %20s\n", "TITLE", "ARTIST")
+	for _, s := range rock.songs {
+		// s := rock.songs[i]
+
+		// #12b: s is a copy inside because struct values are copied
+		s.title = "destroy"
+		fmt.Printf("%-20s %20s\n", s.title, s.artist)
+	}
+
+	// #12
+	fmt.Printf("\n%-20s %20s\n", "TITLE", "ARTIST")
+	for _, s := range rock.songs {
+		fmt.Printf("%-20s %20s\n", s.title, s.artist)
+	}
+}

x-tba/2-structs/04-embedding/main.go

@@ -0,0 +1,66 @@
+// 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"
+)
+
+func main() {
+	// #1: declare the types
+	type text struct {
+		title string
+		words int
+	}
+
+	type book struct {
+		// title string
+		// words int
+
+		// #3: include the text as a field
+		// text text
+
+		// #4: embed the text
+		text
+		isbn string
+
+		// #5: add a conflicting field
+		title string
+	}
+
+	// #2: print a book
+	// moby := book{title: "moby dick", words: 206052, isbn: "102030"}
+	// fmt.Printf("%s has %d words (isbn: %s)\n", moby.title, moby.words, moby.isbn)
+
+	// #3b: type the text in its own field
+	moby := book{
+		// #5c: type the field in a new field
+		// title: "conflict",
+		text: text{title: "moby dick", words: 206052},
+		isbn: "102030",
+	}
+
+	moby.text.words = 1000
+	moby.words++
+
+	// // #4b: print the book
+	fmt.Printf("%s has %d words (isbn: %s)\n",
+		moby.title, // equals to: moby.text.title
+		moby.words, // equals to: moby.text.words
+		moby.isbn)
+
+	// #3c: print the book
+	// fmt.Printf("%s has %d words (isbn: %s)\n",
+	// 	moby.text.title, moby.text.words, moby.isbn)
+
+	// #5b: print the conflict
+	fmt.Printf("%#v\n", moby)
+
+	// go get -u github.com/davecgh/go-spew/spew
+	// spew.Dump(moby)
+}

x-tba/2-structs/exercises/00-name/main.go

@@ -0,0 +1,21 @@
+// 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: ??
+//
+//
+// EXPECTED OUTPUT
+//
+//
+// ---------------------------------------------------------
+
+func main() {
+
+}

x-tba/2-structs/exercises/00-name/solution/main.go

@@ -0,0 +1,12 @@
+// 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
+
+func main() {
+
+}

x-tba/2-structs/exercises/README.md

@@ -0,0 +1,5 @@
+# Structs Exercises
+
+## Warm-Up
+
+1. **[?](https://github.com/inancgumus/learngo/tree/master/???)**