answers.rb

# Variable Switch
a, b = b, a

# Palindrome
def palindrome(value = "")
  value.downcase == value.downcase.reverse
end

# Balanced Brackets
def b_brackets(value = "")
  return false if value.size % 2 != 0
  
  h = {"(" => ")", "{" => "}", "[" => "]"}
  l_part = value[0..value.size / 2 - 1]
  r_part = value.reverse[0..value.size / 2 - 1]
  tmp = ""
  l_part.split("").each { |item| tmp += h[item] }
  return tmp == r_part
rescue
  return false
end