SatoTakeshiX

#　公式資料

Effective Go - The Go Programming Language Go Slices: usage and internals - The Go Blog

SatoTakeshiX

let myVariable: Int = {
while(true){}
}()

SatoTakeshiX

var myVariable = 42
let r = (myVariable = 50) //Void
(obj?.myVariable = 50) //Optional<Void>

SatoTakeshiX

package main

import (
	"fmt"
)

func Sqrt(x float64) float64 {

	z := 1.0
	

SatoTakeshiX

package main

import "fmt"

const (
	// Shift it right again 99 places, so we end up with 1<<1, or 2.
	Small = Big >> 99
	// Create a huge number by shifting a 1 bit left 100 places.
	// In other words, the binary number that is 1 followed by 100 zeroes.
	Big = 1 << 100

SatoTakeshiX

package main

import (
	"fmt"
	"math/cmplx"
)

var (
	ToBe   bool       = false
	MaxInt uint64     = 1<<64 - 1

SatoTakeshiX

package main

import "fmt"

func main() {
	var i, j int = 1, 2
	k := 3
	c, python, java := true, false, "no!"

	fmt.Println(i, j, k, c, python, java)

SatoTakeshiX

package main

import (
	"fmt"
	r "math/rand"
)

func main() {
	fmt.Println("My favorite number is", r.Intn(10))
}

SatoTakeshiX

extension Bool {
    struct Extension {
        let value: Bool
        func toggle() -> Bool {
            return !value
        }
    }

    var `extension`: Extension {
        return Extension(value: self)

SatoTakeshiX

fun main(args: Array<String>){

    // いろんな型を扱う方法->Any型で扱ってみる。値を操作するときはキャストする
    var intContainer = ContainerAny(123)
    var i: Int = intContainer.value as Int //valueをasでダウンキャストしてIntとして扱う
    println(i) //->123と表示
    var strContainer = ContainerAny("Hello")
    var s = strContainer.value as String //valueをasでダウンキャストしてStringとして扱う
    println(s) //-> Helloが表示