DNA

C# Cheat Sheet

Strings

"Foo" // string
'F'   // Char

Interpolations

DNA

# frozen_string_literal: true

module Arel
  module Visitors
    class SQLServer < Arel::Visitors::ToSql

      def table_From_Statement o
        core = o.cores.first

        table_From_Node(core.from) || table_From_Node(core.source)

DNA

# frozen_string_literal: true

class SerializableReport < JSONAPI::Serializable::Resource
  using Refinements::SerializableHash

  id { @object['id'] }

  attributes :foo, :bar
end

DNA

def beach(*temperature)
  case temperature
  in :celcius | :c, (20..45)
    :favorable
  in :kelvin | :k, (293..318)
    :scientifically_favorable
  in :fahrenheit | :f, (68..113)
    :favorable_in_us
  else
    :avoid_beach

DNA

"WTF IS \033[30;47m???", a practical cheat-sheet

Font color definitions can be intimidating and nonsense at first,
but it is quite easy, lets just follow character by character:

   ┌────────┤\033├── Escape character (ESC)
   │┌───────┤ [  ├── Define a sequence (many characters in a code)
   ││
   ││┌──────┤ X  ├── Parameter (optional)  ┐ 
   │││┌─────┤ ;  ├── Parameter separator   │ SGR Code

DNA

#! /usr/bin/env ruby

require 'matrix'

# puts "▀▁▂▃▄▅▆▇█▉▊▋▌▍▎▏▐░▒▓▔▕▖▗▘▙▚▛▜▝▞▟"

EMPTY = ' '
BLOCK = '░'
BOX   = '█'

DNA

#! /usr/bin/env ruby

# Write a function that returns true if the brackets in a given string are balanced.
# Balanced means that every parenthesis/bracket or brace that is opened must be closed
# And it must be closed in the right order (Always close the last symbol you opened)
# The function must handle parens (), square brackets [], and curly braces {}.

# "(a[0]+b[2c[6]]) {24 + 53}" should return true
# "f(e(d))" should return true
# "[()]{}([])" should return true

DNA

#! /usr/bin/env node

function validate_cpf(strCPF) {
    if (new Set(strCPF).size == 1) return false

    cpf = Array.from(strCPF).map(Number);

    return [9, 10].every(pos => {
        multiplier = pos + 1

DNA

class Stat(object):
    class Delta(object):
        def __init__(self, parent):
            self.parent = parent
            self.value = parent.value

        def __repr__(self):
            return '<Stat.Delta value={}>'.format(self.calculate())

        def __str__(self):

DNA

#! /usr/bin/env ruby

# ./worktime 10:12 [13:06] [14:15] [19:40]

now = Time.now
expected_work_time = 28800

if ARGV[0].nil?
    puts 'Você precisa fornecer ao menos o horário de entrada'
    exit 1