Design Patterns

Design patterns are typical solutions to common problems
in software design. Each pattern is like a blueprint
that you can customize to solve a particular
design problem in your code.

Catalog of patterns

List of 22 classic design patterns,
grouped by their intent.

Benefits of patterns

Patterns are a toolkit of solutions to common
problems in software design. They define
a common language that helps your team
communicate more efficiently.

Classification

Design patterns differ by their complexity, level of
detail and scale of applicability. In addition,
they can be categorized by their intent
and divided into three groups.

History of patterns

Who invented patterns and when?
Can you use patterns outside software
development? How do you do that?

Criticism of patterns

Are patterns as good as advertised?
Is it always possible to use them?
Can patterns sometimes be harmful?