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Docker

Building an image

Note: don't forget to create a Dockerfile in the same directory. Next command build new php-obfuscator image from current directory:

docker build -t php-obfuscator .

How to verify? Next command should print info about new image:

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async function getJSON(response) {
  if (response.status === 204) return '';
  return response.json();
}

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const express = require('express')
const cors = require('cors')
const bodyParser = require("body-parser")
const app = express()

const PORT = process.env.port || 4000

// to parse req.body for POST-requests
app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());

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async function walk(dir) {
    let files = await fs.readdir(dir)
    files = await Promise.all(files.map(async file => {
        const filePath = path.join(dir, file)
        const stats = await fs.stat(filePath)
        if (stats.isDirectory()) {
            return walk(filePath);
        }
        else if (stats.isFile()) {
            return filePath;

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const withImages = require("next-images");
const nextConfig = {...}
module.exports = (phase) => {
    if (phase === PHASE_DEVELOPMENT_SERVER || phase === PHASE_PRODUCTION_BUILD) {
        const withCSS = require("@zeit/next-css");
        return withCss(withImages(nextConfig)))));
    }
    return withImages(nextConfig);
};

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1. Run single test

node <path-to-jest> -i <you-test-file> -c <jest-config> -t "<test-block-name>"

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Change Iphone submit button text from "Go" to "Search"

You need create form and at least one input element. Required:

1. input with type="search"
2. define attribute "action" at form

<form action="">
	<input type="search" name="q" aria-label="Search" />

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Fetch handle response

Variant 1

const requestOptions = {
    mode: 'cors',
    headers: {
      'Content-Type': 'application/json',
      'Access-Control-Allow-Origin': '*'
    }

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Quick servers

Python

user@user-pc:~$ python3 -m http.server 8000
user@user-pc:~$ python -m SimpleHTTPServer 8000

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Compare two one dimensional arrays

isEqualOneDimensionalArrays (arr1, arr2) {
    if (arr1.length !== arr2.length) {
      return false
    }

    const sortedArr1 = arr1.sort()
 const sortedArr2 = arr2.sort()