makaroni4

require "ostruct"

class User
  def initialize(basic_params)
    @json_params = OpenStruct.new(basic_params)
  end

  def full_name
    [
      @json_params.first_name,

makaroni4

{
  "rules": {    
    ".read": false,
    ".write": false,
    "incremental_counter": {
      ".validate": "newData.isNumber() && newData.val() === data.val() + 1",
      ".read": true,           
      ".write": true
    } 
  }

makaroni4

require 'benchmark'
require 'benchmark/ips'

Benchmark.ips do |r|
  r.report("+ ") do
    42 + 42
  end

  r.report("* ") do
    42 * 42

makaroni4

#include <stdio.h>

long long int myfunc (long long int i, long long int cache[])
{
  if(cache[i]) {
    return cache[i];
  }

  if (i <= 2) {
    return i;

makaroni4

SELECT 
  age(now(), query_start) AS duration, 
  state, 
  pid, 
  query, 
  datname, 
  application_name, 
  waiting 
FROM pg_stat_activity
ORDER BY duration DESC NULLS LAST;

makaroni4

ALTER TABLE mc_subscribers ADD COLUMN id BIGSERIAL;
UPDATE mc_subscribers SET id = nextval(pg_get_serial_sequence('mc_subscribers', 'id'));
ALTER TABLE mc_subscribers ADD PRIMARY KEY (id);

makaroni4

input = ["red", "green", "blue", "red", "blue"]

output = input.each_with_object(Hash.new(0)) do |word, o|
  o[word] += 1
end

p output

#  {"red"=>2, "green"=>1, "blue"=>2} 

makaroni4

require 'parser'
require 'parser/current'

module OneLetterVariableDetector
  class NodeAnalyzer < Struct.new(:node, :path)
    def analyze
      return unless node && node.respond_to?(:type)

      if node.type == :lvasgn || node.type == :lvar
        if lvar_name.size == 1

makaroni4

train_path.each do |obj|
  result << obj.obj_id
end if train_path.any?

#
# 1. Если ты вызываешь метод .each, то как минимум переменная
# должна иметь множественное число, это ведь коллекция (массив),
# т.е. это train_paths
#
# 2. Если массив пуст, то метод .each сразу вернет пустой массив

makaroni4

require 'active_record'
require 'csv'

ActiveRecord::Base.establish_connection(
  adapter: "mysql2",
  host: "localhost",
  database: "36on_development",
  user: "username",
  password: "password",
  pool: 5,