https://go.dev/play/p/x5zlgzvtSYP
package main
var x int = 0
func main() {
https://go.dev/play/p/x5zlgzvtSYP
package main
var x int = 0
func main() {
-- Monad laws and examples | |
-- Thanks to http://learnyouahaskell.com/a-fistful-of-monads#monad-laws | |
-- Left identity | |
-- return x >>= f equals to f x | |
l1 = return 3 >>= (\x -> Just (x + 100000)) | |
l2 = (\x -> Just (x + 100000)) 3 | |
l3 = return "WoM" >>= (\x -> [x,x,x]) |
package main | |
func main() { | |
v3 := Vector3D[int]{1,2,3} | |
println(DProd[Vector3D[int], int](v3,v3)) | |
} | |
type Numeric interface { | |
~int | ~int8 | ~int16 | ~int32 | ~int64 | | |
~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr | |
// PathPattern codes | |
// "/hoge/:id" | |
// "/hoge/fuga/:name" | |
// "/hoge/fuga/hoho/:value" | |
// "/hoge/:param/fuga" | |
// | |
// :name = fuga AND :param = fuga | |
// |
# S-043: レシート明細テーブル(receipt)と顧客テーブル(customer)を結合し、性別(gender)と年代(ageから計算)ごとに売上金額(amount)を合計した売上サマリテーブル(sales_summary)を作成せよ。性別は0が男性、1が女性、9が不明を表すものとする。 | |
# ただし、項目構成は年代、女性の売上金額、男性の売上金額、性別不明の売上金額の4項目とすること(縦に年代、横に性別のクロス集計)。また、年代は10歳ごとの階級とすること。 | |
with recursive ls(l,u) as ( | |
select 0,10 | |
union all | |
select l+10, u+10 from ls | |
), levels as ( | |
select l,u, cast(l as text) || '-' || cast(u as text) as title | |
from ls |
package main | |
import "fmt" | |
type T struct { | |
x int | |
} | |
func (t *T) Set(x int) { | |
t.x = x |
// timerにexecutorを渡す例 | |
// timerは定期実行と定期実行の終了に責任を持つ | |
// 実行される処理と処理を終了すべきかどうかの判断はexecutorが持つ | |
class Timer { | |
constructor(executor, interval) { | |
this.executor = executor; | |
this.interval = interval; | |
} | |
start() { | |
const execute = () => { |
// timer機能と、定期的に実行される操作が混ざっている | |
class AutoLottery { | |
constructor(action, interval) { | |
this.action = action; | |
this.interval = interval; | |
this.count = 0; | |
} | |
start() { | |
const execute = () => { | |
this.action(); |
use std::collections::HashSet; | |
fn main() { | |
let mut candidate_count = 0; | |
for i in 1..100000 { | |
if satisfy(i) { | |
candidate_count += 1; | |
println!("Candidate: {}", i.to_string()); | |
} | |
} |
package main | |
import ( | |
"fmt" | |
"math" | |
"strconv" | |
) | |
func main() { | |
var answers []int |