Object-Oriented Design Patterns

Object-oriented design patterns implemented in TypeScript, from the book Design Patterns: Elements of Object-Oriented Sofware, by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides, also known as the Gang of Four.

Abstract Factory

Posted by Dustin Boston in .

The Abstract Factory design pattern provides a way to create families of related objects without specifying their concrete classes. It ensures consistency among objects in a family and promotes flexibility when adding new variants or configurations.

Adapter

Posted by Dustin Boston .

CAUTION

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Bridge

Posted by Dustin Boston .

CAUTION

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Builder

Posted by Dustin Boston .

The Builder pattern decouples construction of an object from its underlying structure so that one builder can create multiple types of objects.

Command

Posted by Dustin Boston .

CAUTION

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Composite

Posted by Dustin Boston .

CAUTION

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O p « e L r O A R G e a p d e e a t e d m t f i r ( o C » o C a C v h n o t o e i ( m i m ( l ) p o p C d o n o o ( n ( n m i e ) e p n n n o t t t n ) ) e O A R G n p d e e t e d m t ) r ( o C C a C v h o t o e i m i m ( l p o p C d o n o o ( s ( n m i i ) e p n t n o t e t n ) ) e n t ) c h i l d r e n

Decorator

Posted by Dustin Boston .

CAUTION

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Facade

Posted by Dustin Boston .

CAUTION

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Factory Method

Posted by Dustin Boston .

CAUTION

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Flyweight

Posted by Dustin Boston .

CAUTION

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Interpreter

Posted by Dustin Boston .

CAUTION

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Iterator

Posted by Dustin Boston .

CAUTION

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A C C C g r o r g e n e r a c a e t r t g e e e a I t I t t e t e e A e r g r a g a t r t o e o r g r ( a ) t e r e C t l u i r e n n t n e w C o n c r e I F N I C C t t i e s u o e e r x D r n I r s t o r c t a t ( n e r e t ( ) e n e r o ) ( t t a r ) I e t t I o e t r m e ( ( r t ) a h t i o s r )

Mediator

Posted by Dustin Boston .

CAUTION

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Memento

Posted by Dustin Boston .

CAUTION

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Observer

Posted by Dustin Boston .

CAUTION

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S A D N C G S s u t e o o e e u b t t t n t t b j a a i c S S j e c c f r t t e c h h y e a a c t ( ( ( t t t t O O ) e e e S b b S ( ( t s s u ) ) a e e b t r r j e v v e e e c r r t ) ) o b s f r e o e r r a t v - u e a > r r U n s i p n d s a u o t b b e j s ( e e ) c r t v S e t r a s t e O U b p C U o s d o p b e a n d s r t c a e v e r t r e ( e e v r ) t ( e e ) r O S b t s a e t r e v e r o b s s e u r b v j e e r c S t t - a > t G e e t = S t a t e ( )

Prototype

Posted by Dustin Boston .

CAUTION

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Proxy

Posted by Dustin Boston .

CAUTION

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Singleton

Posted by Dustin Boston .

CAUTION

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State

Posted by Dustin Boston .

CAUTION

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Strategy

Posted by Dustin Boston .

The strategy pattern decouples the client from its implementation, allowing the client to use different algorithms interchangeably without knowing the specifics of each algorithm’s implementation.

« V C « E A e C a o C m l . o l n o a g g n i t e n i o . t d e . v c l r e a x g a r V i V x t t . l e a t a t o I i t l h l » r n i d e i m i t s a S d I d e V t t a n a r a o r t t t f l r a i e e a i - t o r ( c d > e n f ) e ( V g S a ( ) a y t c ) l A r e i » a ( d t ) a s t t e r ( « P A e a ) C h l . t o o g g e n n o . g c e r y r V i V / e a t a v t l h l a e i m i l S d I d i t a n a d r t t t a a i e e t t o r ( o e n f ) r g S a y t c B r e » a ( t ) « V A e « M A e S a l . C o l . t l g g o n g g r i o . n t o . a d r c h r t a i V r V i V e t t a e a t a g i h l t l h l y o m i e i m i » n I d S d I d S n a t a n a t t t r t t t r e e a i e e a r ( t o r ( t f ) e n f ) e a g S a g c y t c y e C r e ( » a ( ) t )

Visitor

Posted by Dustin Boston .

CAUTION

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