はじめに
- 個人的に主要言語と思う8言語&スクリプト(python, JavaScript, Rust, Haskell, C++, C#, bash, PowerShell)のチートシートです
- インデントのために全角空白を含んでます。コピペする場合は気を付けて下さい
- ChatGPT(GPT-4)に書かせたコードなので一部変なコードがあるかもしれません
- 動かない場合はChatGPTにコードと一緒に"<プログラミング名>で<大分類名>の<小分類名>をやろうと思うんだけど、このコードを修正して。"的なことを書けば大抵の場合修正してくれます
チートシート
スプレッドシート版(こちらのほうが見やすいです)
記事版(中身はスプレッドシート版と同じです)
大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
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基礎 | 変数定義(ミュータブル) | a=1 |
let a=1 |
let mut a=1 |
let a=1 |
int a=1 |
int a=1 |
$a=1 |
$a=1 |
↓↓↓↓↓↓↓ あなたの記事の内容 | |||||||||
基礎 | 変数定義(イミュータブル) | -- | const x = 1 |
let x = 1 |
let x = 1 |
const int x = 1 |
const int x = 1 |
readonly x=1 |
$x = 1 |
─────── | |||||||||
基礎 | 変数定義(イミュータブル) | X = 1 |
const x = 1 |
let x = 1 |
let x = 1 |
const int x = 1 |
const int x = 1 |
readonly x=1 |
$x = 1 |
↑↑↑↑↑↑↑ 編集リクエストの内容 | |||||||||
計算 | 二項演算子 | result = 1 + 2 |
const result = 1 + 2; |
let result = 1 + 2; |
result = 1 + 2 |
int result = 1 + 2; |
int result = 1 + 2; |
result=$((1 + 2)) |
$result = 1 + 2 |
計算 | 論理演算子 | result = True and False |
const result = true && false; |
let result = true && false; |
result = True && False |
bool result = true && false; |
bool result = true && false; |
result=$(true && false) |
$result = $true -and $false |
大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
比較演算子 | 等価 | result = 1 == 2 |
const result = 1 == 2; |
let result = 1 == 2; |
result = 1 == 2 |
bool result = 1 == 2; |
bool result = 1 == 2; |
result=$((1 == 2)) |
$result = 1 -eq 2 |
比較演算子 | 不等価 | result = 1 != 2 |
const result = 1 != 2; |
let result = 1 != 2; |
result = 1 /= 2 |
bool result = 1 != 2; |
bool result = 1 != 2; |
result=$((1 != 2)) |
$result = 1 -ne 2 |
比較演算子 | 大小比較 | result = 1 < 2 |
const result = 1 < 2; |
let result = 1 < 2; |
result = 1 < 2 |
bool result = 1 < 2; |
bool result = 1 < 2; |
result=$((1 < 2)) |
$result = 1 -lt 2 |
条件分岐 | if 文 |
if a > b: print("a > b") else: print("a <= b")
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if (a > b) { console.log("a > b"); } else { console.log("a <= b"); }
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if a > b { println!("a > b"); } else { println!("a <= b"); }
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if a > b then putStrLn "a > b" else putStrLn "a <= b"
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if (a > b) { std::cout << "a > b" << std::endl; } else { std::cout << "a <= b" << std::endl; }
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if (a > b) { Console.WriteLine("a > b"); } else { Console.WriteLine("a <= b"); }
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if [ $a -gt $b ]; then echo "a > b" else echo "a <= b" fi
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if ($a -gt $b) { Write-Host "a > b" } else { Write-Host "a <= b" }
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
繰り返し | for 文 |
for i in range(5): print(i)
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for (let i = 0; i < 5; i++) { console.log(i); }
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for i in 0..5 { println!("{}", i); }
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forM_ [0..4] $ \i -> print i
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for (int i = 0; i < 5; i++) { std::cout << i << std::endl; }
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for (int i = 0; i < 5; i++) { Console.WriteLine(i); }
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for i in {0..4}; do echo $i done
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for ($i = 0; $i-lt 5; $i++) { Write-Host $i }
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繰り返し | while 文 |
i = 0 while i < 5: i += 1
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let i = 0 while (i < 5) { i++; }
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let mut i = 0; while i < 5 { i += 1; }
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i <- 0 while (i < 5) $ do i <- i + 1
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int i = 0; while (i < 5) { i++; }
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int i = 0; while (i < 5) { i++; }
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i=0 while [ $i -lt 5 ]; do ((i++)) done
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$i = 0 while ($i -lt 5) { $i++ }
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関数 | 関数定義 |
def add(a, b): return a + b
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function add(a, b) { return a + b; }
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fn add(a: i32, b: i32) -> i32 { a + b }
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add a b = a + b |
int add(int a, int b) { return a + b; }
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int Add(int a, int b) { return a + b; }
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add() { echo $(($1 + $2)) }
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function Add($a, $b) { return $a + $b }
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関数 | 関数呼び出し |
result = add(2, 3) print(result)
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let result = add(2, 3); console.log(result); }
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let result = add(2, 3); println!("{}", result); }
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let result = add 2 3 print result
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int result = add(2, 3); std::cout << result << std::endl; }
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int result = Add(2, 3); Console.WriteLine(result); }
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result=$(add 2 3) echo $result
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$result = Add(2, 3) Write-Host $result
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
関数 | 関数の引数 |
def greet(name): return f"Hello, {name}!"
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function greet(name) { return Hello, ${name}!; }
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fn greet(name: &str) -> String { format!("Hello, {}!", name) }
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greet :: String -> String greet name = "Hello, " ++ name ++ "!"
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std::string greet(std::string name) { return "Hello, " + name + "!"; }
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public static string Greet(string name) { return $"Hello, {name}!"; }
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greet() { echo "Hello, $1!" }
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function Greet($name) { return "Hello, $name!" }
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関数 | ラムダ関数 | add = lambda x, y: x + y |
const add = (x, y) => x + y; |
let add = |x: i32, y: i32| x + y; |
add = \x y -> x + y |
auto add = [](int x, int y) { return x + y; }; |
Func<int, int, int> add = (x, y) => x + y; |
add() { echo $(($1 + $2)) }
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$add = { param($x, $y) return $x + $y } |
関数 | ジェネレータ関数 |
def gen_func(): yield 1 yield 2 yield 3
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function* gen_func() { yield 1; yield 2; yield 3; }` |
fn gen_func() -> impl Iterator<Item=i32> { vec![1, 2, 3].into_iter() }
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gen_func = [1, 2, 3] |
std::vector<int> gen_func() { return {1, 2, 3}; }
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IEnumerable<int> GenFunc() { yield return 1; yield return 2; yield return 3; }` |
gen_func() { echo 1 echo 2 echo 3 }
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function Gen-Func { 1, 2, 3 }
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ファイル | ファイルの読み込み |
with open('file.txt', 'r') as f: content = f.read()
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fs = require('fs'); content = fs.readFileSync('file.txt', 'utf8'); }
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use std::fs; let content = fs::read_to_string("file.txt").unwrap(); }
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content <- readFile "file.txt" |
std::ifstream file("file.txt"); std::string content((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>()); }
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using (StreamReader sr = new StreamReader("file.txt")) { string content = sr.ReadToEnd(); }
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content=$(cat file.txt) |
$content = Get-Content -Path 'file.txt' -Raw }
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
ファイル | ファイルの書き込み |
with open('file.txt', 'w') as f: f.write('Hello, World!')
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fs = require('fs'); fs.writeFileSync('file.txt', 'Hello, World!', 'utf8'); }
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use std::fs::File; use std::io::Write; let mut file = File::create("file.txt").unwrap(); file.write_all(b"Hello, World!").unwrap(); }
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writeFile "file.txt" "Hello, World!" |
std::ofstream file("file.txt"); file << "Hello, World!"; file.close(); }
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using (StreamWriter sw = new StreamWriter("file.txt")) { sw.Write("Hello, World!"); }
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echo 'Hello, World!' > file.txt |
Set-Content -Path 'file.txt' -Value 'Hello, World!' }
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リスト | リストの生成 | lst = [1, 2, 3] |
let lst = [1, 2, 3]; |
let lst = vec![1, 2, 3]; |
lst = [1, 2, 3] |
std::vector<int> lst = {1, 2, 3}; |
List<int> lst = new List<int> { 1, 2, 3 }; |
lst=(1 2 3) |
$lst = @(1, 2, 3) |
リスト | リストの要素追加 | lst.append(4) |
lst.push(4); |
lst.push(4); |
lst = lst ++ [4] |
lst.push_back(4); |
lst.Add(4); |
lst+=("4") |
$lst += 4 |
リスト | リストの要素削除 | lst.remove(2) |
lst.splice(lst.indexOf(2), 1); |
lst.retain(|&x| x != 2); |
lst = filter (/=2) lst |
lst.erase(std::remove(lst.begin(), lst.end(), 2), lst.end()); |
lst.Remove(2); |
lst=("${lst[@]/2}") |
$lst = $lst -ne 2 |
大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
リスト | リストの長さ取得 | len([1, 2, 3]) |
[1, 2, 3].length; |
vec![1, 2, 3].len() |
length [1, 2, 3] |
std::vector<int> v = {1, 2, 3}; v.size();
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int[] arr = {1, 2, 3}; arr.Length;
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array=(1 2 3) echo ${#array[@]}
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@(1, 2, 3).Count |
リスト | リストのスライス |
my_list = [1, 2, 3, 4, 5] sliced_list = my_list[1:4]
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const my_list = [1, 2, 3, 4, 5]; const sliced_list = my_list.slice(1, 4);
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let my_list = vec![1, 2, 3, 4, 5]; let sliced_list = &my_list[1..4];
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my_list = [1, 2, 3, 4, 5] sliced_list = take 3 (drop 1 my_list)
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std::vector<int> my_list{1, 2, 3, 4, 5}; std::vector<int> sliced_list(my_list.begin() + 1, my_list.begin() + 4);
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List<int> my_list = new List<int> {1, 2, 3, 4, 5}; List<int> sliced_list = my_list.GetRange(1, 3);
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my_list=(1 2 3 4 5) sliced_list=("${my_list[@]:1:3}")
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$my_list = @(1, 2, 3, 4, 5) $sliced_list = $my_list[1..3]
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リスト | ソート |
s=['a','d','c'] s.sorted()
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let numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5]; numbers.sort((a, b)=>(a - b));
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let mut numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5]; numbers.sort();
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let numbers = [3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5] let sortedNumbers = sort numbers
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int numbers[] = {3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5}; int n = sizeof(numbers) / sizeof(numbers[0]); std::sort(numbers, numbers + n);
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int[] numbers = { 3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5 }; Array.Sort(numbers);
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numbers=(3 1 4 1 5 9 2 6 5 3 5) sorted=($(echo "${numbers[@]}" | tr ' ' '\n' | sort -n))
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$numbers = 3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5 $sorted = $numbers | Sort-Object
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文字列 | 文字列の結合 |
s1 = 'hello' s2 = 'world' s3 = s1 + ' ' + s2
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let s1 = 'hello'; let s2 = 'world'; let s3 = s1 + ' ' + s2;
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let s1 = String::from("hello"); let s2 = String::from("world"); let s3 = format!("{} {}", s1, s2);
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s1 = "hello" s2 = "world" s3 = s1 ++ " " ++ s2
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std::string s1 = "hello"; std::string s2 = "world"; std::string s3 = s1 + " " + s2;
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string s1 = "hello"; string s2 = "world"; string s3 = s1 + " " + s2;
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s1="hello" s2="world" s3="${s1} ${s2}"
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$s1 = "hello" $s2 = "world" $s3 = $s1 + " " + $s2
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
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文字列 | 文字列の分割 |
s = 'a,b,c' lst = s.split(',')
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let s = 'a,b,c'; let lst = s.split(',');
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let s = "a,b,c"; let lst: Vec<&str> = s.split(',').collect();
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s = "a,b,c" lst = splitOn "," s
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std::string s = "a,b,c"; std::vectorstd::string lst; std::istringstream ss(s); std::string token; while (std::getline(ss, token, ',')) { lst.push_back(token); }
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string s = "a,b,c"; string[] lst = s.Split(',');
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s="a,b,c" IFS=',' read -ra lst <<< "$s"
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$s = "a,b,c" $lst = $s -split ','
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文字列 | 文字列長取得 | len("hello") |
"hello".length; |
"hello".len() |
length "hello" |
std::string s = "hello"; s.length();
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"hello".Length; |
echo -n "hello" | wc -c |
("hello").Length |
文字列 | 文字列置換 | "hello world".replace("world", "everyone") |
"hello world".replace("world", "everyone"); |
"hello world".replace("world", "everyone") |
substitute "world" "everyone" "hello world" |
std::string s = "hello world"; std::replace(s.begin(), s.end(), "world", "everyone");
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"hello world".Replace("world", "everyone"); |
echo "hello world" | sed 's/world/everyone/' |
"hello world".Replace("world", "everyone") |
文字列 | 文字列の大文字化 |
s = "hello" upper_s = s.upper()
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let s = "hello"; let upper_s = s.toUpperCase();
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let s = "hello".to_string(); let upper_s = s.to_uppercase();
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s = "hello" upper_s = map toUpper s
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std::string s = "hello"; std::transform(s.begin(), s.end(), s.begin(), ::toupper);
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string s = "hello"; string upper_s = s.ToUpper();
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s="hello" upper_s="${s^^}"
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$s = "hello" $upper_s = $s.ToUpper()
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
文字列 | 文字列の小文字化 |
s = "HELLO" lower_s = s.lower()
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let s = "HELLO"; let lower_s = s.toLowerCase();
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let s = "HELLO".to_string(); let lower_s = s.to_lowercase();
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s = "HELLO" lower_s = map toLower s
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std::string s = "HELLO"; std::transform(s.begin(), s.end(), s.begin(), ::tolower);
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string s = "HELLO"; string lower_s = s.ToLower();
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s="HELLO" lower_s="${s,,}"
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$s = "HELLO" $lower_s = $s.ToLower()
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文字列 | 文字列の検索 |
text = "Hello, World!" index = text.find("World")
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const text = "Hello, World!"; const index = text.indexOf("World");
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let text = "Hello, World!"; let index = text.find("World");
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text = "Hello, World!" index = Data.List.findIndex "World" text
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std::string text = "Hello, World!"; size_t index = text.find("World");
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string text = "Hello, World!"; int index = text.IndexOf("World");
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text="Hello, World!" index=$(echo "$text" | grep -b -o "World" | cut -d: -f1)
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$text = "Hello, World!" $index = $text.IndexOf("World")
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文字列 | 文字列の逆順 |
text = "Hello, World!" reversed_text = text[::-1]
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const text = "Hello, World!"; const reversed_text = text.split("").reverse().join("");
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let text = "Hello, World!"; let reversed_text = text.chars().rev().collect::<String>();
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text = "Hello, World!" reversed_text = reverse text
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std::string text = "Hello, World!"; std::reverse(text.begin(), text.end());
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string text = "Hello, World!"; char[] charArray = text.ToCharArray(); Array.Reverse(charArray); string reversed_text = new string(charArray);
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text="Hello, World!" reversed_text=$(echo "$text" | rev)
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$text = "Hello, World!" $reversed_text = -join ($text[-1..-($text.Length)])
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文字列 | 文字列の繰り返し |
text = "abc" repeated_text = text * 3
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const text = "abc"; const repeated_text = text.repeat(3);
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let text = "abc"; let repeated_text = text.repeat(3);
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text = "abc" repeated_text = concat $ replicate 3 text
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std::string text = "abc"; std::string repeated_text(text, 3);
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string text = "abc"; string repeated_text = new StringBuilder().Insert(0, text, 3).ToString();
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text="abc" repeated_text=$(printf "%.0s$text" {1..3})
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$text = "abc" $repeated_text = $text * 3
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
文字列 | 文字列の一部取得 |
text = "abcde" substring = text[1:4]
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const text = "abcde"; const substring = text.slice(1, 4);
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let text = "abcde"; let substring = &text[1..4];
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text = "abcde" substring = take 3 $ drop 1 text
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std::string text = "abcde"; std::string substring = text.substr(1, 3);
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string text = "abcde"; string substring = text.Substring(1, 3);
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text="abcde" substring=${text:1:3}
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$text = "abcde" $substring = $text.Substring(1, 3)
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文字列 | 文字列の一部置換 |
text = "hello world" replaced_text = text.replace("world", "python")
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const text = "hello world"; const replaced_text = text.replace("world", "python");
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let text = String::from("hello world"); let replaced_text = text.replace("world", "python");
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text = "hello world" replaced_text = replace "world" "python" text
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std::string text = "hello world"; std::string replaced_text = text; size_t pos = replaced_text.find("world"); if (pos != std::string::npos) { replaced_text.replace(pos, 5, "python"); }
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string text = "hello world"; string replaced_text = text.Replace("world", "python");
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text="hello world" replaced_text="${text/world/python}"
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$text = "hello world" $replaced_text = $text.Replace("world", "python")
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辞書 | 生成 | d = {'a': 1, 'b': 2, 'c': 3} |
let d = {'a': 1, 'b': 2, 'c': 3}; |
let d = [("a", 1), ("b", 2), ("c", 3)].iter().cloned().collect(); |
d = [("a", 1), ("b", 2), ("c", 3)] |
std::map<std::string, int> d = {{"a", 1}, {"b", 2}, {"c", 3}}; |
Dictionary<string, int> d = new Dictionary<string, int> { { "a", 1 }, { "b", 2 }, { "c", 3 } }; |
declare -A d=( ["a"]=1 ["b"]=2 ["c"]=3 ) |
$d = @{ "a" = 1; "b" = 2; "c" = 3 } |
辞書 | 要素の取得 | value = d['a'] |
let value = d['a']; |
let value = d.get("a").unwrap(); |
value = lookup "a" d |
int value = d["a"]; |
int value = d["a"]; |
value="${d["a"]}" |
$value = $d["a"] |
大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
辞書 | 要素の追加 | d['d'] = 4 |
d['d'] = 4; |
d.insert("d", 4); |
d = insert "d" 4 d |
d.insert(std::pair<std::string, int>("d", 4)); |
d.Add("d", 4); |
d+=( ["d"]=4 ) |
$d.Add("d", 4) |
辞書 | 要素の削除 | del d['a'] |
delete d['a']; |
d.remove("a"); |
d = delete "a" d |
d.erase("a"); |
d.Remove("a"); |
unset d["a"] |
$d.Remove("a") |
エラー処理 | try-except |
try: ... except: ...
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try { ... } catch (error) { ... }
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match func() { Ok() => {...}, Err() => {...}, }
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case func of Left e -> ... Right r -> ...
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try { ... } catch (...) { ... }
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try { ... } catch (Exception) { ... }
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if command; then ... else ... fi
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try { ... } catch { ... }
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数学 | 乱数生成 |
import random random.randint(1, 10)
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Math.floor(Math.random() * 10) + 1; |
use rand::Rng; rand::thread_rng().gen_range(1..=10)
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import System.Random randomR (1, 10)
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#include <random> std::uniform_int_distribution<>(1, 10)(std::default_random_engine())
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Random rnd = new Random(); rnd.Next(1, 11);
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$((RANDOM % 10) + 1) |
Get-Random -Minimum 1 -Maximum 11 |
大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
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日付・時刻 | 現在時刻取得 |
import datetime datetime.datetime.now()
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new Date(); |
use chrono::Local; Local::now()
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import Data.Time.Clock getCurrentTime
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#include <ctime> std::time(0)
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DateTime.Now; |
date |
Get-Date |
日付・時刻 | 時間差計算 |
from datetime import datetime, timedelta delta = timedelta(days=1) new_date = datetime.now() + delta
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const date = new Date(); const newDate = new Date(date.getTime() + 86400000);
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use chrono::{Duration, Utc}; let new_date = Utc::now() + Duration::days(1);
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import Data.Time.Clock new_date = addUTCTime (60 * 60 * 24) getCurrentTime
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std::chrono::system_clock::time_point now = std::chrono::system_clock::now(); auto new_date = now + std::chrono::hours(24);
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DateTime now = DateTime.Now; DateTime new_date = now.AddHours(24);
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new_date=$(date -d "+1 day" +"%Y-%m-%d") |
$now = Get-Date $new_date = $now.AddDays(1)
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クラス | クラス定義 |
class Dog: def bark(self): print("Woof!")
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class Dog { bark() { console.log("Woof!"); } }
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struct Dog; impl Dog { fn bark(&self) { println!("Woof!"); } }
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data Dog = Dog bark :: Dog -> String bark _ = "Woof!"
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class Dog { public: void bark() { std::cout << "Woof!" << std::endl; } };
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public class Dog { public void Bark() { Console.WriteLine("Woof!"); } }
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# クラスのような構造はシェルスクリプトにはないため、スキップします。 |
class Dog { [void] Bark() { Write-Host "Woof!" } }
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クラス | クラスのインスタンス化 |
my_dog = Dog() my_dog.bark()
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let myDog = new Dog(); myDog.bark(); }
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let my_dog = Dog; my_dog.bark(); }
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let myDog = Dog putStrLn $ bark myDog
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Dog myDog; myDog.bark(); }
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Dog myDog = new Dog(); myDog.Bark(); }
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# クラスのような構造はシェルスクリプトにはないため、スキップします。 |
$myDog = [Dog]::new(); $myDog.Bark(); }
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
モジュール | インポート | import math |
import * as math from 'math'; |
use std::math; |
import Math |
#include <cmath> |
using System.Math; |
source math.sh |
Import-Module Math |
モジュール | 関数呼び出し | result = math.sqrt(4) |
const result = math.sqrt(4); |
let result = f64::sqrt(4.0); |
result = sqrt 4 |
double result = std::sqrt(4); |
double result = Math.Sqrt(4); |
result=$(sqrt 4) |
$result = [Math]::Sqrt(4) |
辞書 | キーのリスト取得 |
d = {'a': 1, 'b': 2} keys = list(d.keys())
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let d = {'a': 1, 'b': 2}; let keys = Object.keys(d);
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let d = vec![("a", 1), ("b", 2)]; let keys = d.iter().map(|(k, \_)| k).collect::<Vec<&str>>();
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import Data.Map let d = fromList [("a", 1), ("b", 2)] let keys = keys d
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std::map<std::string, int> d = {{"a", 1}, {"b", 2}}; std::vectorstd::string keys; for (const auto& kvp : d) { keys.push_back(kvp.first); }
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var d = new Dictionary<string, int> { { "a", 1 }, { "b", 2 } }; List<string> keys = d.Keys.ToList();
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declare -A d=( ["a"]=1 ["b"]=2 ) keys=("${!d[@]}")
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$d = @{"a"=1;"b"=2} $keys = $d.Keys
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辞書 | 値のリスト取得 |
d = {'a': 1, 'b': 2} values = list(d.values())
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let d = {'a': 1, 'b': 2}; let values = Object.values(d);
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let d = vec![("a", 1), ("b", 2)]; let values = d.iter().map(|(\_, v)| v).collect::<Vec<&i32>>();
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import Data.Map let d = fromList [("a", 1), ("b", 2)] let values = elems d
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std::map<std::string, int> d = {{"a", 1}, {"b", 2}}; std::vector<int> values; for (const auto& kvp : d) { values.push_back(kvp.second); }
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var d = new Dictionary<string, int> { { "a", 1 }, { "b", 2 } }; List<int> values = d.Values.ToList();
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declare -A d=( ["a"]=1 ["b"]=2 ) values=("${d[@]}")
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$d = @{"a"=1;"b"=2} $values = $d.Values
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大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
関数 | クロージャ |
def outer(x): def inner(y): return x + y return inner f = outer(10) result = f(5)
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function outer(x) { return function inner(y) { return x + y; }; } let f = outer(10); let result = f(5);
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fn outer(x: i32) -> impl Fn(i32) -> i32 { move |y| x + y } let f = outer(10); let result = f(5);
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outer :: Int -> Int -> Int outer x = \y -> x + y f = outer 10 result = f 5
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auto outer(int x) { return [x](int y) { return x + y; }; } auto f = outer(10); int result = f(5);
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Func<int, int> Outer(int x) { return y => x + y; } var f = Outer(10); int result = f(5);
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outer() { x=$1; inner() { y=$1; echo $((x+y)); }; return 0; } f=$(outer 10) result=$(f 5)
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function Outer($x) { return { param($y) $x + $y }; } $f = Outer 10 $result = $f.Invoke(5)
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関数 | 関数の戻り値 |
def add(x, y): return x + y result = add(1, 2)
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function add(x, y) { return x + y; } let result = add(1, 2);
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fn add(x: i32, y: i32) -> i32 { x + y } let result = add(1, 2);
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add :: Int -> Int -> Int add x y = x + y result = add 1 2
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int add(int x, int y) { return x + y; } int result = add(1, 2);
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int Add(int x, int y) { return x + y; } int result = Add(1, 2);
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add() { return $(($1 + $2)); } result=$(add 1 2)
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function Add($x, $y) { return $x + $y; } $result = Add 1 2
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数学 | 平方根の取得 |
import math sqrt_val = math.sqrt(25)
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const sqrt_val = Math.sqrt(25); |
use std::f64; let sqrt_val = f64::sqrt(25.0);
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sqrt_val = sqrt 25 |
double sqrt_val = std::sqrt(25); |
double sqrt_val = Math.Sqrt(25); |
sqrt_val=$(echo "scale=0;sqrt(25)" | bc) |
$sqrt_val = [Math]::Sqrt(25) |
数学 | 絶対値の取得 | abs_val = abs(-10) |
const abs_val = Math.abs(-10); |
let abs_val = i32::abs(-10); |
abs_val = abs (-10) |
int abs_val = std::abs(-10); |
int abs_val = Math.Abs(-10); |
abs_val=$(echo "scale=0;(-10)" | bc) |
$abs_val = [Math]::Abs(-10) |
大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
数学 | 三角関数の取得 |
import math sin_val = math.sin(math.radians(30))
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const sin_val = Math.sin(Math.PI / 6); |
use std::f64; let sin_val = f64::sin(f64::consts::PI / 6.0);
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sin_val = sin(pi / 6) |
double sin_val = std::sin(M_PI / 6); |
double sin_val = Math.Sin(Math.PI / 6); |
sin_val=$(echo "scale=2;sin(30 * 3.14159/180)" | bc -l) |
$sin_val = [Math]::Sin([Math]::PI / 6) |
集合 | 集合の生成 | my_set = {1, 2, 3} |
const mySet = new Set([1, 2, 3]); |
use std::collections::HashSet; let my_set: HashSet<i32> = [1, 2, 3].iter().cloned().collect();
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mySet = Data.Set.fromList [1, 2, 3] |
std::set<int> my_set = {1, 2, 3}; |
HashSet<int> mySet = new HashSet<int>(){1, 2, 3}; |
my_set=$(echo "1 2 3" | tr ' ' '\n' | sort -u) |
$mySet = [1, 2, 3] -as [System.Collections.Generic.HashSet[int]] |
集合 | 要素の追加 | my_set.add(4) |
mySet.add(4); |
my_set.insert(4); |
mySet = Data.Set.insert 4 mySet |
my_set.insert(4); |
mySet.Add(4); |
my_set=$(echo "$my_set"; echo "4") | sort -u |
$mySet.Add(4) |
集合 | 要素の削除 | my_set.remove(3) |
mySet.delete(3); |
my_set.remove(&3); |
mySet = Data.Set.delete 3 mySet |
my_set.erase(3); |
mySet.Remove(3); |
my_set=$(echo "$my_set" | grep -v '^3$') |
$mySet.Remove(3) |
大分類 | 小分類 | python | JavaScript | Rust | Haskell | C++ | C# | bash | PowerShell |
---|---|---|---|---|---|---|---|---|---|
集合 | 長さ取得 | len(my_set) |
mySet.size; |
my_set.len(); |
Data.Set.size mySet |
my_set.size(); |
mySet.Count; |
my_set_count=$(echo "$my_set" | wc -l) |
$mySet.Count |
集合 | 集合の交差 |
set1 = {1, 2, 3} set2 = {2, 3, 4} intersection = set1.intersection(set2)
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const set1 = new Set([1, 2, 3]); const set2 = new Set([2, 3, 4]); const intersection = new Set([...set1].filter(x => set2.has(x)));
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use std::collections::HashSet; let set1: HashSet<> = [1, 2, 3].iter().cloned().collect(); let set2: HashSet<> = [2, 3, 4].iter().cloned().collect(); let intersection: HashSet<> = set1.intersection(&set2).cloned().collect();
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import qualified Data.Set as Set set1 = Set.fromList [1, 2, 3] set2 = Set.fromList [2, 3, 4] intersection = Set.intersection set1 set2
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std::set<int> set1{1, 2, 3}; std::set<int> set2{2, 3, 4}; std::set<int> intersection; std::set_intersection(set1.begin(), set1.end(), set2.begin(), set2.end(), std::inserter(intersection, intersection.begin()));
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HashSet<int> set1 = new HashSet<int> {1, 2, 3}; HashSet<int> set2 = new HashSet<int> {2, 3, 4}; set1.IntersectWith(set2);
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set1=(1 2 3) set2=(2 3 4) intersection=($(comm -12 <(echo "${set1[@]}" | tr ' ' '\n' | sort) <(echo "${set2[@]}" | tr ' ' '\n' | sort)))
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$set1 = @('1','2','3') $set2 = @('2','3','4') $intersection = $set1 | ? { $set2 -contains $ }
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集合 | 集合の和集合 |
set1 = {1, 2, 3} set2 = {3, 4, 5} union_set = set1.union(set2)
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const set1 = new Set([1, 2, 3]); const set2 = new Set([3, 4, 5]); const union_set = new Set([...set1, ...set2]);
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use std::collections::HashSet; let set1: HashSet<> = [1, 2, 3].iter().cloned().collect(); let set2: HashSet<> = [3, 4, 5].iter().cloned().collect(); let union_set: HashSet<_> = set1.union(&set2).cloned().collect();
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import Data.Set let set1 = fromList [1, 2, 3] let set2 = fromList [3, 4, 5] let union_set = set1 union set2
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std::unordered_set<int> set1 = {1, 2, 3}; std::unordered_set<int> set2 = {3, 4, 5}; std::unordered_set<int> union_set; std::set_union(set1.begin(), set1.end(), set2.begin(), set2.end(), std::inserter(union_set, union_set.begin()));
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HashSet<int> set1 = new HashSet<int> {1, 2, 3}; HashSet<int> set2 = new HashSet<int> {3, 4, 5}; set1.UnionWith(set2);
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set1=(1 2 3) set2=(3 4 5) union_set=($(echo "${set1[@]}" "${set2[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))
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$set1 = @(1, 2, 3) $set2 = @(3, 4, 5) $union_set = $set1 + $set2 | Sort-Object -Unique
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集合 | 集合の差集合 |
set1 = {1, 2, 3} set2 = {2, 3, 4} difference = set1.difference(set2)
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const set1 = new Set([1, 2, 3]); const set2 = new Set([2, 3, 4]); const difference = new Set([...set1].filter(x => !set2.has(x)));
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use std::collections::HashSet; let set1: HashSet<i32> = [1, 2, 3].iter().cloned().collect(); let set2: HashSet<i32> = [2, 3, 4].iter().cloned().collect(); let difference: HashSet<i32> = set1.difference(&set2).cloned().collect();
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import Data.Set as Set set1 = Set.fromList [1, 2, 3] set2 = Set.fromList [2, 3, 4] difference = Set.difference set1 set2
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std::set<int> set1{1, 2, 3}; std::set<int> set2{2, 3, 4}; std::set<int> difference; std::set_difference(set1.begin(), set1.end(), set2.begin(), set2.end(), std::inserter(difference, difference.begin()));
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HashSet<int> set1 = new HashSet<int> { 1, 2, 3 }; HashSet<int> set2 = new HashSet<int> { 2, 3, 4 }; HashSet<int> difference = new HashSet<int>(set1); difference.ExceptWith(set2);
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set1="1 2 3" set2="2 3 4" difference=$(comm -23 <(echo "$set1" | tr ' ' '\n' | sort) <(echo "$set2" | tr ' ' '\n' | sort) | tr '\n' ' ')
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$set1 = @(1, 2, 3) $set2 = @(2, 3, 4) $difference = $set1 | Where-Object { -not ($set2 -contains $_) }
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集合 | 集合の部分集合判定 |
A = {1, 2, 3} B = {1, 2} is_subset = B.issubset(A)
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const A = new Set([1, 2, 3]); const B = new Set([1, 2]); const is_subset = [...B].every(x => A.has(x));
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use std::collections::HashSet; let A: HashSet<i32> = [1, 2, 3].iter().cloned().collect(); let B: HashSet<i32> = [1, 2].iter().cloned().collect(); let is_subset = B.is_subset(&A);
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import Data.Set (isSubsetOf, fromList) let A = fromList [1, 2, 3] let B = fromList [1, 2] let is_subset = B isSubsetOf A
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std::set<int> A{1, 2, 3}; std::set<int> B{1, 2}; bool is_subset = std::includes(A.begin(), A.end(), B.begin(), B.end());
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HashSet<int> A = new HashSet<int>(){1, 2, 3}; HashSet<int> B = new HashSet<int>(){1, 2}; bool is_subset = B.IsSubsetOf(A);
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A="1 2 3" B="1 2" is_subset=true for e in $B; do if ! [[ $A =~ $e ]]; then is_subset=false; break; fi; done
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$A = @{1, 2, 3} $B = @{1, 2} $is_subset = $B.IsSubsetOf($A)
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