Useful String Methods

strings.rb

class String
  
  #Capitalize the beginning of ever word in a string.
    def word_capitalize
        self.gsub(/\b\w/){$&.upcase}
    end
  
  #Check for balanced parantheses
    def para_check?
        para=Array.new
        self.each_char do |chr|
            case chr
            when "("
                para<<chr
            when "{"
                para<<chr
            when "["
                para<<chr
            when ")"
                if !(para.pop=="(")
                  return false
                end
            when "}"
                if !(para.pop=="{")
                  return false
                end 
            when "]"
                if !(para.pop=="[")
                  return false
                end
            end
        end 
        if !para.empty?
            return false
        else
            return true
        end
    end

  #Remove duplicate chars
    def rem_dup
        self.each_char do |c|
            if self.count(c)>1
                self.gsub!(c,"")
            end
        end
        return self
    end  

end