head first design patterns 真正非扫描版

You’renotalone. Atanygivenmoment,somewhereintheworldsomeonestruggleswiththesamesoftwaredesignproblemsyouhave.Youknowyoudon’twanttoreinventthewheel(orworse,aflattire),soyoulooktoDesignPatterns–thelessonslearnedbythosewho’vefacedthesameproblems.WithDe