initial commit

This commit is contained in:
Greg Gauthier 2021-03-01 18:12:37 +00:00
commit e5820a4c03
10 changed files with 255 additions and 0 deletions

4
.gitignore vendored Normal file
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.idea/
build/
pymodule/
*.iml

36
arrays.go Normal file
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package main
import "fmt"
func main() {
var a [5]int
fmt.Println("emp:", a)
a[4] = 100
fmt.Println("set:", a)
fmt.Println("get:", a[4])
fmt.Println("len:", len(a))
b := [5]int{1, 2, 3, 4, 5}
fmt.Println("dcl:", b)
var twoD [2][3]int
for i := 0; i < 2; i++ {
for j := 0; j < 3; j++ {
twoD[i][j] = i + j
}
}
fmt.Println("2d: ", twoD)
var threeD [3][6][9]int
for i := 0; i < 3; i++ {
for j := 0; j < 6; j++ {
for k := 0; k < 9; k++ {
threeD[i][j][k] = i + j + k
}
}
}
fmt.Println("3D: ", threeD)
}

28
forloop.go Normal file
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package main
import "fmt"
func main() {
i := 1
for i <= 3 {
fmt.Println(i)
i = i + 1
}
for j := 7; j <= 9; j++ {
fmt.Println(j)
}
for {
fmt.Println("loop")
break
}
for n := 0; n <= 5; n++ {
if n%2 == 0 {
continue
}
fmt.Println(n)
}
}

7
hello-world.go Normal file
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package main
import "fmt"
func main() {
fmt.Println("hello world")
}

24
if-else.go Normal file
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package main
import "fmt"
func main() {
if 7%2 == 0 {
fmt.Println("7 is even")
} else {
fmt.Println("7 is odd")
}
if 8%4 == 0 {
fmt.Println("8 is divisible by 4")
}
if num := 9; num < 0 {
fmt.Println(num, "is negative")
} else if num < 10 {
fmt.Println(num, "has 1 digit")
} else {
fmt.Println(num, "has multiple digits")
}
}

21
maths.go Normal file
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package main
import (
"fmt"
"math"
)
const s string = "constant"
func main() {
fmt.Println(s)
const n = 500000000
const d = 3e20 / n
fmt.Println(d)
fmt.Println(int64(d))
fmt.Println(math.Sin(n))
}

47
slices.go Normal file
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package main
import "fmt"
func main() {
s := make([]string, 3)
fmt.Println("emp:", s)
s[0] = "a"
s[1] = "b"
s[2] = "c"
fmt.Println("set:", s)
fmt.Println("get:", s[2])
fmt.Println("len:", len(s))
s = append(s, "d")
s = append(s, "e", "f")
fmt.Println("apd:", s)
c := make([]string, len(s))
copy(c, s)
fmt.Println("cpy:", c)
l := s[2:5]
fmt.Println("sl1:", l)
l = s[:5]
fmt.Println("sl2:", l)
l = s[2:]
fmt.Println("sl3:", l)
t := []string{"g", "h", "i"}
fmt.Println("dcl:", t)
twoD := make([][]int, 3)
for i := 0; i < 3; i++ {
innerLen := i + 1
twoD[i] = make([]int, innerLen)
for j := 0; j < innerLen; j++ {
twoD[i][j] = i + j
}
}
fmt.Println("2d: ", twoD)
}

52
switcher.go Normal file
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package main
import (
"fmt"
"time"
)
func main() {
i := 2
fmt.Print("Write ", i, " as ")
switch i {
case 1:
fmt.Println("one")
case 2:
fmt.Println("two")
case 3:
fmt.Println("three")
}
switch time.Now().Weekday() {
case time.Saturday, time.Sunday:
fmt.Println("It's the weekend")
default:
fmt.Println("It's a weekday")
}
t := time.Now()
switch {
case t.Hour() < 12:
fmt.Println("It's before noon")
default:
fmt.Println("It's after noon")
}
whatAmI := func(i interface{}) {
switch t := i.(type) {
case bool:
fmt.Println("I'm a bool")
case int:
fmt.Println("I'm an int")
case string:
fmt.Println("I'm a string")
default:
fmt.Printf("Don't know type %T\n", t)
}
}
whatAmI(true)
whatAmI(1)
whatAmI("hey")
whatAmI(new(time.Duration))
}

15
values.go Normal file
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package main
import "fmt"
func main() {
fmt.Println("go" + "lang")
fmt.Println("1+1 =", 1+1)
fmt.Println("7.0/3.0 =", 7.0/3.0)
fmt.Println(true && false)
fmt.Println(true || false)
fmt.Println(!true)
}

21
variables.go Normal file
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package main
import "fmt"
func main() {
var a = "initial"
fmt.Println(a)
var b, c int = 1, 2
fmt.Println(b, c)
var d = true
fmt.Println(d)
var e int
fmt.Println(e)
f := "apple"
fmt.Println(f)
}