Mat1s

class Games
  attr_accessor :array_of_score
  def initialize(array_of_score)
    @array_of_score = array_of_score
  end

  def check_attributes(rival)
    return 'wrong attributes' unless @array_of_score.is_a?(Array) &&
                                        rival.is_a?(Array)

Mat1s

class String
  def palindrome?
    self.downcase == self.downcase.reverse
  end
end
puts "erere".palindrome? # true
puts "ror5".palindrome? # false
str3 = 'fdsf fdJJfd ajk hlj fqjqfpot otirn dfsdl dskj vcbn cx'
puts str3.palindrome? # false
str4 = 'xc nbcv jksd ldsfd nrito otirn dfsdl dskj vcbn cx'

Mat1s

def count_words(str)
  str.split.length
end

srt2 = 'fdsf fdsfd ajk hlj fqjqfpot otirn dfsdl dskj vcbn cx'
puts count_words srt2

Mat1s

def sort_string(str)
  str.split.sort_by(&:length).join(' ')
end

srt1 = 'fdsf fdsfd ajk hlj fqjqfpot otirn dfsdl dskj vcbn cx'
puts sort_string srt1

Mat1s

numbers6 = [18, 234, 74, 47, -1163, -15, -1, 0, 71, 5143, 36]
puts numbers6.sort #immutable number_6
puts numbers6.sort! #mutable number_6

Mat1s

print a = [1, 2, -2, 9, -3, -8, 4, 5, -6, 7, -8]

print a.flat_map { |elem| elem > 0 ? [a[0], elem] : elem }

print a.reduce([]) { |temp, i| temp.push(a[0]) if i > 0; temp.push(i) }

def add_before_positive(arr, f = arr.first)
  arr.map.with_index do |elem, i|
    if i > 0 && elem > 0
      arr_cut = arr.slice!(i..-1)

Mat1s

def left_rotate(arr)
  arr.push(arr.shift)
end

numbers4 = [18, 234, 74, 47, 1163, -15, -1, 0, 71, 5143, 36]
p left_rotate numbers4

Mat1s

def change_positive_on_first_elem(num)
  m = num.min
  num.map { |n| n > 0 ? m : n }
end

numbers3 = [180, 204, 154, -167, -163, 154, -110, -171, -143, -196]
puts change_positive_on_first_elem numbers3

Mat1s

def highest_student(height, surnames)
  surnames[height.index(height.max)]
end

height = [180, 204, 154, 167, 163, 154, 110, 171, 143, 196]
students = ['Dziatlov', 'Smith)', 'Borakov', 'Smirnov', 'Kot', 'Gorshenia',
            'Sapozhnikav', 'Landay', 'Tolstoy', 'Mihailin']
puts highest_student height, students

Mat1s

def check_attributes(your, rival)
  return 'wrong attributes' unless your.is_a?(Array) && 
                                        rival.is_a?(Array) 
  (rival + your).each do |i|
    return 'wrong type in Array' unless i.is_a?(Integer) && i >= 0 
  end
 'different count game' unless rival.length == your.length
end

def win_or_lost_game(your, rival)