| 3-tier |
data<->business logic<->presentation separation (strict relationships) |
| abstract_factory |
use a generic function with specific factories |
| adapter |
adapt one interface to another using a whitelist |
| borg |
a singleton with shared-state among instances |
| bridge |
a client-provider middleman to soften interface changes |
| builder |
call many little discrete methods rather than having a huge number of constructor parameters |
| catalog |
general methods will call different specialized methods based on construction parameter |
| chain |
apply a chain of successive handlers to try and process the data |
| command |
bundle a command and arguments to call later |
| composite |
encapsulate and provide access to a number of different objects |
| decorator |
wrap functionality with other functionality in order to affect outputs |
| facade |
use one class as an API to a number of others |
| factory_method |
delegate a specialized function/method to create instances |
| flyweight |
transparently reuse existing instances of objects with similar/identical state |
| graph_search |
(graphing algorithms, not design patterns) |
| iterator |
structure repeated, identical calls as a generator |
| mediator |
an object that knows how to connect other objects and act as a proxy |
| memento |
generate an opaque token that can be used to go back to a previous state |
| mvc |
model<->view<->controller (non-strict relationships) |
| observer |
provide a callback for notification of events/changes to data |
| pool |
preinstantiate and maintain a group of instances of the same type |
| prototype |
use a factory and clones of a prototype for new instances (if instantiation is expensive) |
| proxy |
an object funnels operations to something else |
| publish_subscribe |
a source syndicates events/data to 0+ registered listeners |
| state |
logic is org'd into a discrete number of potential states and the next state that can be transitioned to |
| strategy |
selectable operations over the same data |
| template |
an object imposes a structure but takes pluggable components |
| visitor |
invoke a callback for all items of a collection |