alex-alekseichuk

function createEnum(labels, startIndex = 0) {
  return Object.freeze(labels.reduce((enu, label, i) => {enu[label] = i + startIndex; return enu;}, {}));
}

const ERRORS = util.createEnum(['OK', 'UNKNOWN_ERROR', 'SERVER_ERROR']);
console.log(ERRORS.OK);

alex-alekseichuk

const var1 = "string1";
const var2 = 7;

console.log({var1, var2}); // is much better than
console.log(var1, var2);

// because it outputs both the name of variables and their values.

alex-alekseichuk

// There is a limit for uploading content in axios library by default.
// To avoid such a "feature", and be able to upload large files add to options:
options.maxBodyLength = Infinity;
options.maxContentLength = Infinity;

alex-alekseichuk

process.stdin.setRawMode(true);
process.stdin.resume();
process.stdin.on('data', process.exit.bind(process, 0));

alex-alekseichuk

package main

import "fmt"

func main() {
    const (
        C8 = iota * 2 + 8
        C10
        C12
        C14

alex-alekseichuk

#!/bin/bash
cmds=(cat tac head tail tee more less echo wc grep find sort comm tr cut split sed awk seq)
for cmd in $cmds; do
  man $cmd|sed -n '4p'|sed -E 's/^\s+//;s/ - /\n  /'
done

alex-alekseichuk

// Brute-force solution of the Zebra Puzzle
// https://code.energy/solving-zebra-puzzle/
//
// Result:
// Norwegian from 1 house drinks water.
// Japanese from 5 house owns zebra.

package main

import (

alex-alekseichuk

// Test task: check if brackets string balanced

const bracketsMatch = {
  '{': '}',
  '[': ']',
  '(': ')',
}

function isBalanced(brackets) {
  const stack = []

alex-alekseichuk

#!/usr/bin/env node

function createFizzBuzzGenerator() {
  const values = Array(16).fill(null).map((_, i) => {
    const x = i + 1
    if (x % 3 !== 0 && x % 5 !== 0)
      return x
    let result = ''
    if (x % 3 === 0)
      result += 'Fizz'

alex-alekseichuk

// Nullish coalescing
// Нулевое слияние
// if data is undefined
const getUserName = (user) => {
  return user?.name ?? "Anonymous";
};

// will display `fallbackData`
// if data is false-ish (e.g., null, undefined, '', 0, etc.)
console.log(data || fallbackData);