[PYTHON] Frequently used syntax memorandum for each language

Introduction

I'll forget it soon. I will write it down little by little. We are dealing with C #, Java, Scala, JavaScript, Python3, PHP. Scala Because I'm a beginner, I thought I'd put it together anyway.

The link destination to the sample is "JSFiddle" for JavaScript, and "Ideone" for others. Refer to here for environment construction: Environment construction for each language, simple confirmation and skill test --Qiita

Input / output

Hello World

• C#：Hello World

C#

using System;
class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Hello " + Console.ReadLine() + "!");
    }
}

• Java：Hello World

Java

import java.util.*;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        System.out.println("Hello " + sc.next() + "!");
    }
}

• Scala：Hello World

Scala

object Main extends App {
    println("Hello " + readLine + "!");
}

• JavaScript：Hello World

JavaScript

function Main(input) {
  alert('Hello ' + input + '!');
}
Main('World');

• Python3：Hello World

Python3

print("Hello " + input() + "!")

• PHP：Hello World

PHP

<?php
fscanf(STDIN, "%s", $s);
echo "Hello " . $s . "!";

Array manipulation

Initialization

-C #: Array initialization

C#

int[] ary1 = {1, 2, 3};
int[,] ary2 = {{11, 12, 13}, {21, 22, 23}, {31, 32, 33}};
int[][] ary3 = {new int[]{11, 12, 13}, new int[]{21, 22, 23}, new int[]{31, 32, 33}};

-Java: Array initialization

Java

int ary1[] = {1, 2, 3};
int ary2[][] = {{11, 12, 13}, {21, 22, 23}, {31, 32, 33}};

-Scala: Array initialization

Scala

var ary1 = Seq(1, 2, 3);
var ary2 = Seq(Seq(11, 12, 13), Seq(21, 22, 23), Seq(31, 32, 33));

-JavaScript: Array initialization

JavaScript

var ary1 = [1, 2, 3];
var ary2 = [[11, 12, 13], [21, 22, 23], [31, 32, 33]];

-Python3: Array initialization

Python3

ary1 = [1, 2, 3]
ary2 = [[11, 12, 13], [21, 22, 23], [31, 32, 33]]

-PHP: Array initialization

PHP

$ary1 = [1, 2, 3];
$ary2 = [[11, 12, 13], [21, 22, 23], [31, 32, 33]];

File operations

Input / output

--C #: File input / output

C#

using System.IO;
using System.Text;

var text = File.ReadAllText(@"C:\hoge1.txt", Encoding.UTF8);
var lines = File.ReadAllLines(@"C:\hoge1.txt", Encoding.UTF8);

File.WriteAllText(@"C:\hoge2.txt", "Hoge", Encoding.UTF8);
File.WriteAllLines(@"C:\hoge2.txt", lines, Encoding.UTF8);

--Java: File input / output

Java

import java.util.List;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.charset.StandardCharsets;

List<String> lines = Files.readAllLines(Paths.get("C:\\hoge1.txt"), StandardCharsets.UTF_8);

Files.write(Paths.get("c:\\hoge2.txt"), lines, StandardCharsets.UTF_8);
Files.write(Paths.get("c:\\hoge3.txt"), "Hoge".getBytes(StandardCharsets.UTF_8));

--Scala: File input / output

For now I don't know of a better way than the same as Java.

-JavaScript: File input / output

Let's see various things.

html

<form>
  <input type="file" id="file"/><br>
  <textarea id="write"></textarea><br>
  <a id="download" href="#" download="hoge.txt">download</a>
</form>

JavaScript

document.getElementById("file").addEventListener('change', f => {
  var reader = new FileReader();
  reader.readAsText(f.target.files[0]);
  reader.addEventListener( 'load', () => {
    document.getElementById("write").value = reader.result;
  });
});
document.getElementById("download").addEventListener('click', () => {
  var text = document.getElementById("write").value;
  var blob = new Blob([ text ], { "type" : "text/plain" });
  document.getElementById("download").href = window.URL.createObjectURL(blob);
});

--Python3: File input / output

Python3

text = open('C:\hoge1.txt', 'r', encoding='utf-8').read()
open('C:\hoge2.txt', 'w', encoding='utf-8').write('Hoge')

--PHP: File input / output

PHP

$text = file_get_contents('C:\hoge1.txt');
file_put_contents('C:\hoge2.txt', 'Hoge');

Added at any time

It's quite troublesome, so let's add it little by little ...

-C #: Add at any time

C#

-Java: Add as needed

Java

-Scala: Add as needed

Scala

-JavaScript: added at any time

JavaScript

-Python3: Added at any time

Python3

-PHP: Add as needed

PHP