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% Document Info
\author{Mihir Solanki (mtechdev)}
\pdfinfo{
  /Title (design-patterns.pdf)
  /Creator (Cheatography)
  /Author (Mihir Solanki (mtechdev))
  /Subject (Design Patterns Cheat Sheet)
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\noindent
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\begin{tabulary}{5.8cm}{C}
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    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Design Patterns Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Mihir Solanki (mtechdev)} via \textcolor{DarkBackground}{\uline{cheatography.com/26261/cs/41174/}}}
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  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Mihir Solanki (mtechdev) \\
  \uline{cheatography.com/mtechdev} \\
  \end{tabulary}
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 4th November, 2023.\\
   Page {\thepage} of \pageref{LastPage}.
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  Measure your website readability!\\
  www.readability-score.com
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\begin{document}
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\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Creational Patterns}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Factory Method} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.} \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Abstract Factory} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you produce families of related objects without specifying their concrete classes.} \tn 
% Row Count 7 (+ 3)
% Row 2
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\mymulticolumn{1}{x{8.4cm}}{Builder} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you construct complex objects step by step. The pattern allows you to produce different types and representations of an object using the same construction code.} \tn 
% Row Count 12 (+ 5)
% Row 3
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\mymulticolumn{1}{x{8.4cm}}{Prototype} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you copy existing objects without making your code dependent on their classes.} \tn 
% Row Count 15 (+ 3)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Singleton} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you ensure that a class has only one instance, while providing a global access point to this instance.} \tn 
% Row Count 19 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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\mymulticolumn{1}{x{8.4cm}}{Creational patterns provide various object creation mechanisms, which increase flexibility and reuse of existing code.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Behavioural Design Patterns}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{Chain of Responsibility} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you pass requests along a chain of handlers. Upon receiving a request, each handler decides either to process the request or to pass it to the next handler in the chain.} \tn 
% Row Count 5 (+ 5)
% Row 1
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\mymulticolumn{1}{x{8.4cm}}{Command} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Turns a request into a stand-alone object that contains all information about the request. This transformation lets you pass requests as a method arguments, delay or queue a request's execution, and support undoable operations.} \tn 
% Row Count 11 (+ 6)
% Row 2
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\mymulticolumn{1}{x{8.4cm}}{Iterator} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you traverse elements of a collection without exposing its underlying representation (list, stack, tree, etc.).} \tn 
% Row Count 15 (+ 4)
% Row 3
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\mymulticolumn{1}{x{8.4cm}}{Mediator} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you reduce chaotic dependencies between objects. The pattern restricts direct communications between the objects and forces them to collaborate only via a mediator object.} \tn 
% Row Count 20 (+ 5)
% Row 4
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\mymulticolumn{1}{x{8.4cm}}{Momento} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you save and restore the previous state of an object without revealing the details of its implementation.} \tn 
% Row Count 24 (+ 4)
% Row 5
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\mymulticolumn{1}{x{8.4cm}}{Observer} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you define a subscription mechanism to notify multiple objects about any events that happen to the object they're observing.} \tn 
% Row Count 28 (+ 4)
% Row 6
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\mymulticolumn{1}{x{8.4cm}}{State} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets an object alter its behaviour when its internal state changes. It appears as if the object changed its class.} \tn 
% Row Count 32 (+ 4)
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\par\addvspace{1.3em}

\vfill
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\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Behavioural Design Patterns (cont)}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{Strategy} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you define a family of algorithms, put each of them into a separate class, and make their objects interchangeable.} \tn 
% Row Count 4 (+ 4)
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\mymulticolumn{1}{x{8.4cm}}{Template Method} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Defines the skeleton of an algorithm in the superclass but lets subclasses override specific steps of the algorithm without changing its structure.} \tn 
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\mymulticolumn{1}{x{8.4cm}}{Visitor} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you separate algorithms from the objects on which they operate.} \tn 
% Row Count 12 (+ 3)
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\begin{tabularx}{8.4cm}{X}
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\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Structural Design Patterns}}  \tn
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\mymulticolumn{1}{x{8.4cm}}{Adapter} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Allows objects with incompatible interfaces to collaborate.} \tn 
% Row Count 3 (+ 3)
% Row 1
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\mymulticolumn{1}{x{8.4cm}}{Bridge} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you split a large class or a set of closely related classes into two separate \seqsplit{hierarchies—abstraction} and implementation—which can be developed independently of each other.} \tn 
% Row Count 8 (+ 5)
% Row 2
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\mymulticolumn{1}{x{8.4cm}}{Composite} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you compose objects into tree structures and then work with these structures as if they were individual objects.} \tn 
% Row Count 12 (+ 4)
% Row 3
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\mymulticolumn{1}{x{8.4cm}}{Decorator} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you attach new behaviours to objects by placing these objects inside special wrapper objects that contain the behaviors.} \tn 
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\mymulticolumn{1}{x{8.4cm}}{Facade} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Provides a simplified interface to a library, a framework, or any other complex set of classes.} \tn 
% Row Count 20 (+ 4)
% Row 5
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\mymulticolumn{1}{x{8.4cm}}{Flyweight} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you fit more objects into the available amount of RAM by sharing common parts of state between multiple objects instead of keeping all of the data in each object.} \tn 
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% Row 6
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\mymulticolumn{1}{x{8.4cm}}{Proxy} \tn 
\mymulticolumn{1}{x{8.4cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}Lets you provide a substitute or placeholder for another object. A proxy controls access to the original object, allowing you to perform something either before or after the request gets through to the original object.} \tn 
% Row Count 31 (+ 6)
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\mymulticolumn{1}{x{8.4cm}}{Structural patterns explain how to assemble objects and classes into larger structures while keeping these structures flexible and efficient.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
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% That's all folks
\end{multicols*}

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