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const fs = require('fs');
const crypto = require('crypto');

function generateKeyPair() {
    const keyPair = crypto.generateKeyPairSync('rsa', {
        modulusLength: 4096,
        publicKeyEncoding: {
            type: 'pkcs1',
            format: 'pem'
        },

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/[b-df-hj-np-tv-z]+/.test(str)

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'sHoRt AnD sToUt'.toLowerCase().replace(/(^\w{1})|(\s+\w{1})/g, letter => letter.toUpperCase())

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/*
 * Добавляет большей строгости при прогонке тестов.
 * Если в .then или .catch проверка вернула ложный реузльтат, тогда тест упадет.
 *
 * Раньше текст проходили в блоках then и catch, даже если они падали.
 * */
process.on('unhandledRejection', (error) => {
  fail(error);
});

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1. Open up your terminal
2. Enter the command nano ~/.inputrc
3. Paste the following commands one at a time:

set completion-ignore-case on
set show-all-if-ambiguous on
TAB: menu-complete

4. Hit control+O to save changes to .inputrc followed by control+X to exit nano.
5. Open a new Terminal window or tab

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// Next `useEffect` hooks will be working the same

useEffect(() => {
    const id = setInterval(() => {
      setCount(count + 1)
    }, 1000)
    return () => clearInterval(id)
}, [count])

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function typedArrayToURL(typedArr, mimeType) {
  return URL.createObjectURL(new Blob([typedArr.buffer], {type: mimeType}));
}

const bytes = new  Uint8Array(59);
for(let i = 0; i < 59; i++) {
  bytes[i] = 32 + i;
}

const url = typedArrayToURL(bytes, 'application/octet-binary');

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function typedArrayToURL(typedArr, mimeType) {
  return URL.createObjectURL(new Blob([typedArr.buffer], {type: mimeType}));
}

const bytes = new  Uint8Array(59); // you can change this value and calculating bellow for dispalying another/additional ASCII codes
for(let i = 0; i < 59; i++) {
  bytes[i] = 32 + i;
}

const url = typedArrayToURL(bytes, 'text/plain');

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/** 
 * Docs about `serve-static` package:  https://expressjs.com/en/resources/middleware/serve-static.html#setheaders
 * Link on full Glitch project and article about HTTP caching: https://web.dev/codelab-http-cache/
 */ 
const express = require('express');
const app = express();

app.use(express.static('public', {
  etag: true,
  lastModified: true,

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/**
 * Link on the task: https://leetcode.com/problems/permutations/
 * Description: Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order.
 * Example:
 * Input: nums = [1,2,3]
 * Output: [[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]
 */

const permute = function(nums) {
    return (function permutationHeap(array, n, res = []) {