Quick and dirty way to check whether a string of parentheses are balanced.

gistfile1.rb

def balanced?(string)
  string.each_char.inject(0) { |open, char|
    return false if open < 0
    char == '(' ? open + 1 : open - 1
  } == 0
end

p balanced?("()((()))")
p balanced?("())))")
p balanced?("()(((())")