139 lines
3.0 KiB
Go
139 lines
3.0 KiB
Go
// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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// For more tutorials : https://learngoprogramming.com
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// In-person training : https://www.linkedin.com/in/inancgumus/
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// Follow me on twitter: https://twitter.com/inancgumus
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package main
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import (
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"fmt"
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"strings"
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)
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func main() {
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fmt.Println("••••• ARRAYS")
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arrays()
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fmt.Println("\n••••• SLICES")
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slices()
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fmt.Println("\n••••• MAPS")
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maps()
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fmt.Println("\n••••• STRUCTS")
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structs()
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}
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// ••••••••••••••••••••••••••••••••••••••••••••••••••
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type house struct {
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name string
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rooms int
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}
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func structs() {
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myHouse := house{name: "My House", rooms: 5}
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addRoom(myHouse)
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// fmt.Printf("%+v\n", myHouse)
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fmt.Printf("structs() : %p %+v\n", &myHouse, myHouse)
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addRoomPtr(&myHouse)
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fmt.Printf("structs() : %p %+v\n", &myHouse, myHouse)
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}
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func addRoomPtr(h *house) {
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h.rooms++ // same: (*h).rooms++
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fmt.Printf("addRoomPtr() : %p %+v\n", h, h)
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fmt.Printf("&h.name : %p\n", &h.name)
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fmt.Printf("&h.rooms : %p\n", &h.rooms)
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}
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func addRoom(h house) {
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h.rooms++
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fmt.Printf("addRoom() : %p %+v\n", &h, h)
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}
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// ••••••••••••••••••••••••••••••••••••••••••••••••••
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func maps() {
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confused := map[string]int{"one": 2, "two": 1}
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fix(confused)
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fmt.Println(confused)
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// &confused["one"]
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}
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func fix(m map[string]int) {
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m["one"] = 1
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m["two"] = 2
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m["three"] = 3
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}
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// ••••••••••••••••••••••••••••••••••••••••••••••••••
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func slices() {
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dirs := []string{"up", "down", "left", "right"}
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up(dirs)
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fmt.Printf("slices list : %p %q\n", &dirs, dirs)
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upPtr(&dirs)
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fmt.Printf("slices list : %p %q\n", &dirs, dirs)
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}
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func upPtr(list *[]string) {
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lv := *list
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for i := range lv {
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lv[i] = strings.ToUpper(lv[i])
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}
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*list = append(*list, "HEISEN BUG")
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fmt.Printf("upPtr list : %p %q\n", list, list)
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}
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func up(list []string) {
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for i := range list {
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list[i] = strings.ToUpper(list[i])
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fmt.Printf("up.list[%d] : %p\n", i, &list[i])
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}
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list = append(list, "HEISEN BUG")
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fmt.Printf("up list : %p %q\n", &list, list)
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}
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// ••••••••••••••••••••••••••••••••••••••••••••••••••
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func arrays() {
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nums := [...]int{1, 2, 3}
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incr(nums)
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fmt.Printf("arrays nums : %p\n", &nums)
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fmt.Println(nums)
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incrByPtr(&nums)
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fmt.Println(nums)
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}
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func incr(nums [3]int) {
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fmt.Printf("incr nums : %p\n", &nums)
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for i := range nums {
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nums[i]++
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fmt.Printf("incr.nums[%d] : %p\n", i, &nums[i])
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}
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}
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func incrByPtr(nums *[3]int) {
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fmt.Printf("incrByPtr nums: %p\n", &nums)
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for i := range nums {
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nums[i]++ // same: (*nums)[i]++
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}
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}
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