Holub on patterns learning design patterns by looking at code teaches you design patterns in exactly this way by looking at computer programs and analyzing them in terms of the patterns that they use consequently you learn how the patterns actually occur in the real world and how to apply the patterns to solve real problems. Holub on patterns learning design patterns by looking at code allen holub 388x ch00 finalqxd 8 25 04 258 pm page i. The existing books on design patterns take a catalog approach where they show the individual design patterns in isolation this approach is fundamentally flawed because you cant see how the design patterns actually function in the real world most programmers learn by looking at computer programs holub on patterns learning design patterns by looking at code teaches you design patterns in . Holub on patterns learning design patterns by looking at code teaches you design patterns in exactly this way by looking at computer programs and analyzing them in terms of the patterns that they use consequently you learn how the patterns actually occur in the real world and how to apply the patterns to solve real problems. Holub on patterns learning design patterns by looking at code books for professionals by professionals hardcover 1 feb 2005 by allen holub author 40 out of 5 stars 15 ratings see all 7 formats and editions