Go code snippets from a past course.
package main
import "fmt"
func main() {
treasure := "The friends we make along the way."
fmt.Println(&treasure)
}package main
import "fmt"
func main() {
star := "Polaris"
starAddress := &star
*starAddress = "Sirius"
fmt.Println("The actual value of star is", star)
}package main
import "fmt"
func main() {
star := "Polaris"
starAddress := &star
fmt.Println("The address of star is", starAddress)
}package main
import "fmt"
func brainwash(saying *string) {
*saying = "Beep Boop."
}
func main() {
greeting := "Hello there!"
brainwash(&greeting)
fmt.Println("greeting is now:", greeting)
}package main
import "fmt"
func main() {
rightTime := true
rightPlace := true
if rightTime && rightPlace {
fmt.Println("We're outta here!")
} else {
fmt.Println("Be patient...")
}
enoughRobbers := false
enoughBags := true
if enoughRobbers || enoughBags{
fmt.Println("Grab everything!")
} else {
fmt.Println("Grab whatever you can!")
}
}package main
import (
"fmt"
"math/rand"
"time"
)
func main() {
rand.Seed(time.Now().UnixNano())
isHeistOn:=true
eludedGuards:=rand.Intn(100)
if eludedGuards >= 50 {
fmt.Println("Looks like you've managed to make it past the guards. Good job, but remember, this is the first step.")
} else {
isHeistOn=false
fmt.Println("Plan a better disguise next time?")
}
openedVault:=rand.Intn(100)
fmt.Println(isHeistOn)
if isHeistOn && openedVault >=70 {
fmt.Println("Grab and GO!")
} else if isHeistOn {
fmt.Println("Vault can't be opened.")
} else {
fmt.Println("what's the combo to this lock again??")
}
leftSafely:=rand.Intn(5)
if isHeistOn {
switch leftSafely {
case 0:
isHeistOn = false
fmt.Println("Looks like you tripped an alarm... run?")
case 1:
fmt.Print("Turns out the vault doors don't open from the inside...")
case 2 :
fmt.Print("What an earth is happening?")
case 3:
fmt.Print("ugh...?")
default:
fmt.Print("Start the getaway car!")
}
amtStole:= 1000+rand.Intn(1000000)
fmt.Print(amtStole)
}
}package main
import (
"fmt"
"math/rand"
)
func main() {
amountLeft := rand.Intn(10000)
fmt.Println("amountLeft is: ", amountLeft)
if amountLeft > 5000 {
fmt.Println("What should I spend this on?")
} else {
fmt.Println("Where did all my money go?")
}
}package main
import "fmt"
func main() {
if success := true; success {
fmt.Println("We're rich!")
} else {
fmt.Println("Where did we go wrong?")
}
amountStolen := 50000
switch numOfThieves := 5; numOfThieves {
case 1:
fmt.Println("I'll take all $", amountStolen)
case 2:
fmt.Println("Everyone gets $", amountStolen/2)
case 3:
fmt.Println("Everyone gets $", amountStolen/3)
case 4:
fmt.Println("Everyone gets $", amountStolen/4)
case 5:
fmt.Println("Everyone gets $", amountStolen/5)
default:
fmt.Println("There's not enough to go around...")
}
}package main
import (
"fmt"
"math/rand"
"time"
)
func main() {
rand.Seed(time.Now().UnixNano())
amountLeft := rand.Intn(10000)
fmt.Println("amountLeft is: ", amountLeft)
if amountLeft > 5000 {
fmt.Println("What should I spend this on?")
} else {
fmt.Println("Where did all my money go?")
}
}package main
import "fmt"
func main() {
name := "H. J. Simp"
switch name {
case "butch":
fmt.Println("Head to Robbers Roost.")
case "bonnie":
fmt.Println("Stay put in Joplin.")
default:
fmt.Println("Just hide!")
}
}package main
import "fmt"
func queryDatabase(query string) string {
var result string
connectDatabase()
defer disconnectDatabase()
if query == "SELECT * FROM coolTable;" {
result = "NAME|DOB\nVincent Van Gogh|March 30, 1853"
}
fmt.Println(result)
return result
}
func connectDatabase() {
fmt.Println("Connecting to the database.")
}
func disconnectDatabase() {
fmt.Println("Disconnecting from the database.")
}
func main() {
queryDatabase("SELECT * FROM coolTable;")
}package main
import "fmt"
func fuelGauge(fuel int) {
fmt.Printf("%d left", fuel)
}
func calculateFuel(planet string) (int) {
var fuel int
if planet == "Mercury" {
fuel = 500000
} else if planet == "Venus" {
fuel = 300000
} else if planet == "Mars" {
fuel = 700000
}
return fuel
}
func greetPlanet (planet string) {
fmt.Print("Welcome to planet ", planet)
}
func cantFly() {
fmt.Print("We do not have the available fuel to fly there.")
}
func flyToPlanet(planet string, fuel int) (int){
var fuelRemaining, fuelCost int
fuelRemaining = fuel
fuelCost = calculateFuel(planet)
if fuelRemaining >= fuelCost {
greetPlanet(planet)
fuelRemaining -= fuelCost
} else {
cantFly()
}
return fuelRemaining
}
func main() {
fuel := 1000000
planetChoice := "Venus"
fuel = flyToPlanet(planetChoice, fuel)
fuelGauge(fuel)
}package main
import "fmt"
func getLikesAndShares(postId int) (int, int) {
var likesForPost, sharesForPost int
switch postId {
case 1:
likesForPost = 5
sharesForPost = 7
case 2:
likesForPost = 3
sharesForPost = 11
case 3:
likesForPost = 22
sharesForPost = 1
case 4:
likesForPost = 7
sharesForPost = 9
}
fmt.Println("Likes: ", likesForPost, "Shares: ", sharesForPost)
return likesForPost, sharesForPost
}
func main() {
var likes, shares int
likes, shares = getLikesAndShares(4)
if likes > 5 {
fmt.Println("Woohoo! We got some likes.")
}
if shares > 10 {
fmt.Println("We went viral!")
}
}package main
import "fmt"
func computeMarsYears(earthYears int) int {
earthDays := earthYears * 365
marsYears := earthDays / 687
return marsYears
}
func main() {
myAge := 25
myMartianAge := computeMarsYears(myAge)
fmt.Println(myMartianAge)
}package main
import (
"fmt"
"time"
)
func isItLateInNewYork() string {
var lateMessage string
t := time.Now()
tz, _ := time.LoadLocation("America/New_York")
nyHour := t.In(tz).Hour()
if nyHour < 5 {
lateMessage = "Goodness it is late"
} else if nyHour < 16 {
lateMessage = "It's not late at all!"
} else if nyHour < 19 {
lateMessage = "I guess it's getting kind of late"
} else {
lateMessage = "It's late"
}
return lateMessage
}
func main() {
var nyLate string
nyLate = isItLateInNewYork()
fmt.Println(nyLate)
}package main
import (
"math"
"fmt"
)
func specialComputation(x float64) float64{
return math.Log2(math.Sqrt(math.Tan(x)))
}
func main() {
var a, b, c, d float64
a = .0214
b = 1.02
c = 0.312
d = 4.001
a = specialComputation(a)
b = specialComputation(b)
c = specialComputation(c)
d = specialComputation(d)
fmt.Println(a, b, c, d)
}package main
import "fmt"
func startGame() {
instructions := "Press enter to start..."
fmt.Println(instructions)
}
func main() {
startGame()
}package main
import "fmt"
func main() {
const earthsGravity = 9.80665
fmt.Println(earthsGravity)
}package main
import "fmt"
func main() {
daysOnVacation:= 5
var hoursInDay = 24
fmt.Println("You have spent", daysOnVacation * hoursInDay, "hours on vacation.")
}package main
import "fmt"
func main () {
var magicNum, powerLevel int32
magicNum = 2048
powerLevel = 9001
fmt.Println("magicNum is:", magicNum, "powerLevel is:", powerLevel)
amount, unit := 10, "doll hairs"
fmt.Println(amount, unit, ", that's expensive...")
}package main
import "fmt"
func main() {
animal1 := "cat"
animal2 := "dog"
fmt.Printf("Are you a %v or a %v person?", animal1, animal2)
}package main
import "fmt"
func main() {
var publisher, writer, artist, title string
var year, pageNumber int
var grade float32
title = "Mr. GoToSleep"
writer = "Tracey Hatchet"
artist = "Jewel Tampson"
publisher = "DizzyBooks Publishing Inc."
year = 1997
pageNumber = 14
grade = 6.5
fmt.Println(title, "written by", writer, "drawn by", artist, "publisher", publisher, "in", year, "with", pageNumber, "pages", grade)
title="Epic Vol. 1"
writer = "Ryan N. Shawn"
artist = "Phoebe Paperclips"
year = 2013
pageNumber = 160
grade = 9
fmt.Println(title, "written by", writer, "drawn by", artist, "publisher", publisher, "in", year, "with", pageNumber, "pages", grade)
}package main
import "fmt"
func main() {
step1 := "Breathe in..."
step2 := "Breathe out..."
meditation := fmt.Sprintln(step1, step2)
fmt.Print(meditation)
}package main
import "fmt"
func main() {
template := "I wish I had a %v."
pet := "puppy"
var wish string
wish = fmt.Sprintf(template, pet)
fmt.Println(wish)
}package main
import "fmt"
func main() {
coolSneakers := 65.99
niceNecklace := 45.50
var taxCalculation float64
taxCalculation += coolSneakers
taxCalculation += niceNecklace
taxCalculation *= 0.08875
fmt.Println("Purchase of", coolSneakers + niceNecklace, "with 8.875% sales tax", taxCalculation, "equal to", coolSneakers + niceNecklace + taxCalculation)
}package main
import "fmt"
func main() {
var emptyInt int8
var emptyFloat float32
var emptyString string
fmt.Println(emptyInt, emptyFloat, emptyString)
}package main
import "fmt"
func main() {
fmt.Println("What would you like for lunch?")
var food string
fmt.Scan(&food)
fmt.Printf("Sure, we can have %v for lunch.", food)
}
//go run main.gopackage main
import "fmt"
func main() {
floatExample := 1.75
fmt.Printf("Working with a %T", floatExample)
fmt.Println("\n***")
yearsOfExp := 3
reqYearsExp := 15
fmt.Printf("I have %d years of Go experience and this job is asking for %d years.", yearsOfExp, reqYearsExp)
fmt.Println("\n***")
stockPrice := 3.50
fmt.Printf("Each share of Gopher feed is $%.2f.", stockPrice)
}