... conventions, 30 32 singleton with, 70–75syntax for, 75through closures, 33 35 private methods, 25, 37 , 39 , 204privileged functions, 110privileged methods, 34 , 110programming styles, 3 protection proxies, ... pattern,225–226, 230 – 235 Vvalidate function, 127–128var keyword, 36 , 67, 75variablesclosures for, 33 35 constants, 37 38 singleton, 66virtual proxies, 199–200benefits of, 2 13 directory lookup ... pattern, 136 – 139 implements keyword, 13 14information hidingencapsulation and, 26, 39 –40principle of, 25–26role of interface in, 26using closures, 33 38 using naming conventions, 30 32 inheritance,...