ruby - Raise Undefined local variable or method -
ok understand local variable , global variable, got exercise 40 on learnrubythehardway credit ask each method on hash. $cities = {"ca" => "san francisco", "mi" => "detroit", "fl" => "jacksonville"} #adding new kay new value $cities["ny"] = "new york" $cities["or"] = "portland" def loop(map,state) $cities.each |map,state| if map.include? state return map[state] else return "not found." end end end $cities[:find] = method(:loop) while true print "state? (enter quit) " state = gets.chomp break if state.empty? #this line important ever! study! puts $cities[:find].call(cities,state) end the error giving me undefined local variable or method 'cities' anyway understand local variable can access in main file, when comes g
