Print Pattern

print_pattern.rb

def pattern1(num)
  (1..num).each do |x|
    puts (x.to_s) * x
  end
end

def pattern2(num)
  n = 0
  while n < num
    n += 1
    (1..n).each {|i| print i}
    print "\n"
  end
end

def pattern3(num)
  n = 1
  while n < num * 2
    (1..n).each {|i| print i if i % 2 != 0}
    n += 2
    print "\n"
  end
end

def pattern4(num)
  lst = []
  n = 0
  while lst.length < num
    lst << n
    lst.each {|i| print i}
    print "\n"
    if n == 0
      n += 1
    else
      n -= 1
    end
  end
end

def pattern1_rev(num)
  (1..num).reverse_each do |x|
    puts (x.to_s)*x
  end
end


def pattern2_rev(num)
  while 1 <= num
    (1..num).each {|x| print x}
    print "\n"
    num -= 1
  end
end


def pattern3_rev(num)
  num *= 2
  while 1 <= num
    (1..num).each {|x| print x if x % 2 != 0}
    num -= 2
    print "\n"
  end
end

def pattern4_rev(num)
  n = 0
  (1..num).reverse_each do |x|
    (1..x).each do |i|
      print n
      if n == 0
        n += 1
      else
        n -= 1
      end
    end
    print "\n"
  end
end

pattern1 9
pattern2 9
pattern3 9
pattern4 9
puts "*********"
pattern1_rev 9
pattern2_rev 9
pattern3_rev 9
pattern4_rev 9