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def count_letters(text)
  array = []
  text = text.downcase
  text.each_char do |char|
    if char =~ /[A-Za-z]+/
      count = text.count(char)
      array << [char, count]
    end
  end
  array = array.uniq

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class Animal
  attr_reader :distance

  def initialize
    @distance = 0
  end

  def step!
    @distance += 1
  end

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require 'active_model'

class Person
  include ActiveModel::Validations

  attr_accessor :name, :age

  def initialize(name: nil, age: nil)
    @name = name
    @age = age

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class Calculator
  def initialize(var_x, var_y)
    @var_x = var_x
    @var_y = var_y
  end

  def divide
    @var_x / @var_y
  end
end

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require 'rspec'
require 'rspec/its'
require_relative 'task_seven'

RSpec.describe TaskSeven do
  let(:array) { [5, -3, 3, -5, 6, 6, 6, -1, 0, 2] }

  subject { described_class.new array }

  its(:number_elements_after_max) { should eq 3 }

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require 'active_model'

class Person
  include ActiveModel::Validations

  attr_accessor :name, :age, :size

  def initialize name: nil, age: nil, size: nil
    @name = name
    @age = age

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def hello_message options = {}
  first_name = options.fetch :first_name
  last_name = options.fetch :last_name

  "Hello, #{first_name} #{last_name}"
end

data = {first_name: 'Lero4ka', last_name: 'Melnik' }
# p hello_message data

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def summarize *args
  "#{args[0]} #{args[1]} #{args[2]}"
end


p summarize 1,2,3,4,5

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ar = [1, 2, 4]

def square_values array
  array.map! {|e|  e * e }
end

p square_values ar

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module ActsAsWalker
  attr_reader :distance

  def walk!
    @distance += 1
  end
end

module ActsAsSpeaker
  attr_reader :speak, :gills