magicp2.rb

module Magic  
 
  def self.respond_to?(method_sym, include_private = false)
    if method_sym.to_s =~ /^find_where_(.*)$/
      true
    else
      super 
    end
  end
 
  def self.method_missing(m, *args, &block)  
    split_call = m.to_s.split('_')
    if split_call[0] == "find"
      finder(split_call[-1],args[0])
    end
  end 
 
  def self.finder(term, hash)
    if term =~ /^[0-9]$/ 
      term = term.to_i
    end
    hash.find_all{ |pair| pair[1] == term }
  end
end 
 
#-----tests----
joe_hash = { student_A:'joe', student_B:'what', student_C:'joe' }
 
p Magic.find_where_joe(joe_hash)
 
cat_hash = { 1 => Array.new, 2 => "mouse", 3 => "cat" }
 
p Magic.find_where_cat(cat_hash)
 
num_hash = { a: 2, b:'dog' , c: 23, d: 54, e: 23 }
 
p Magic.find_where_23(num_hash)