nk4dev

const anExampleVariable:number [] = [1,2,3,4,5,6,7];
const anExampleVariable2:number [] = [];

anExampleVariable.map(item => {
    anExampleVariable2.push(item * 2)
})

console.log(...anExampleVariable2)

nk4dev

const WebToggle = () => {
    const [toggle, setToggle] = useState<boolean>(false);
    toggle ? '#000' : '#fff';
    return (
        <div>
            <h1>WebToggle</h1>
            <button onClick={() => {
                setToggle(!toggle);
            }}
            style={{

nk4dev

import React, {useState} from "react";

export default function Index () {
	const [count, setCount] = useState(0);
	return (
		<>
			test ui app
			{count}

			<div>

nk4dev

//正解
import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // 最初の#を追加する
        StringBuilder sb = new StringBuilder("#");
        for (int i = 0; i < 3; i++ ) {
            // 10新数ベースの色入力 (R G B)
            int a = sc.nextInt();

nk4dev

import React from 'react';

interface TextBoxState {
  text: string;
}

class TextBox extends React.Component<{}, TextBoxState> {
  constructor(props: {}) {
    super(props);
    this.state = {

nk4dev

//クラス名は必ずMainにする必要があります。
import java.util.*;

public class Main {
    public static void main(String args[] ) throws Exception {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        String s2 = sc.next();
        String s3 = sc.next();
        int sleng = s.length();

nk4dev

String x = "sss";
if (x.endWith("s") && x.startWith("s") ) {
  // other code
}

nk4dev

public class UpperCaseTest {
    public static void main (String[] args) {
        // toUpperCaseTest
        String stunum = "";
        String upperStunum = stunum.toUpperCase();
        System.out.println(upperStunum);

        // toLowerCaseTest
        String myName = "";
        String lowerStunum = myName.toLowerCase();

nk4dev

public class StrUtil {
    public static void main(String[] args) {
        // 文字列編集
        String str = "aaa/aaaaaaa___________a";

        // lastIndexOf -> 一致する複数の文字列の最後のやつを返す
        // endStr.length()

        String endStr = "/";
        int endIndex = str.lastIndexOf(endStr) + endStr.length();

nk4dev

set number
set t_Co=256
set cmdheight=2
set backspace=indent,eol,start

call plug#begin()
Plug 'vim-airline/vim-airline'
Plug 'vim-airline/vim-airline-themes'
Plug 'ryanoasis/vim-devicons'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }