\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{graypes}
\pdfinfo{
  /Title (design-pattern-examples.pdf)
  /Creator (Cheatography)
  /Author (graypes)
  /Subject (Design Pattern Examples Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{7BDDE8}
\definecolor{LightBackground}{HTML}{EEFAFC}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Design Pattern Examples Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{graypes} via \textcolor{DarkBackground}{\uline{cheatography.com/126673/cs/33800/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}graypes \\
  \uline{cheatography.com/graypes} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 24th August, 2022.\\
   Updated 24th August, 2022.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Abstract Factory}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{function ClassFactory() \{ \newline    this.type = 'class' \newline    this.logType = function () \{ \newline       console.log('Type', this.type) \newline    \} \newline \} \newline  \newline function WarriorClass() \{ \newline    ClassFactory.call(this) \newline    this.subtype = 'warrior' \newline    this.logSubtype = function () \{ \newline       console.log('Subtype', this.subtype) \newline    \} \newline \} \newline  \newline function WizardClass() \{ \newline    ClassFactory.call(this) \newline    this.subtype = 'wizard' \newline    this.logSubtype = function () \{ \newline       console.log('Subtype', this.subtype) \newline    \} \newline \} \newline  \newline const \$warrior = new WarriorClass() \newline \$warrior.logType() \newline \$warrior.logSubtype()} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Type class \newline Subtype warrior}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Dynamic Function From String}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{global.runFoo = function runFoo() \{ \newline    if (arguments.length) \{ \newline       let args = {[}{]} \newline       for (let i = 0; i \textless{} arguments.length; i++) \{ \newline          args.push(arguments{[}i{]}) \newline       \} \newline       console.log(`executed runFoo(\$\{args.join()\})`) \newline    \} else \{ \newline       console.log('executed runFoo()') \newline    \} \newline \} \newline  \newline const fn = 'runFoo' \newline const fnParams = {[}1,2,3{]} \newline  \newline global{[}fn{]}() \newline global{[}fn{]}(fnParams)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{executed runFoo() \newline executed runFoo(1,2,3)}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Functional Interface (Interface Segregation)}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{global.oven = function Oven() \{ \newline    this.on = false \newline    this.turnOn = function () \{ \newline       this.on = true \newline    \} \newline    this.turnOff = function () \{ \newline       this.on = false \newline    \} \newline    this.cook = function (item) \{ \newline       console.log(`Cooking \$\{item\} in the oven`) \newline    \} \newline \} \newline  \newline // function Stove() \{ // ES6 \newline global.stove = function Stove() \{ \newline    this.on = false \newline    this.turnOn = function () \{ \newline       this.on = true \newline    \} \newline    this.turnOff = function () \{ \newline       this.on = false \newline    \} \newline    this.cook = function (item) \{ \newline       console.log(`Cooking \$\{item\} in the stove`) \newline    \} \newline \} \newline  \newline function ICooker(cooker) \{ \newline    // let fn = window{[}cooker{]}; // ES6 \newline    let fn = global{[}cooker{]} // Node.js \newline    return new fn() \newline \} \newline  \newline function Restaurant(name, cooker) \{ \newline    this.name = name \newline    this.cooker = new ICooker(cooker) \newline  \newline    this.cook = function (item) \{ \newline       this.cooker.turnOn() \newline       this.cooker.cook(item) \newline       this.cooker.turnOff() \newline    \} \newline \} \newline  \newline const cookerTypes = \{ \newline    OVEN: 'oven', \newline    STOVE: 'stove', \newline \} \newline  \newline const bakery = new Restaurant('Bakery', cookerTypes.OVEN) \newline bakery.cook('cookies') \newline  \newline const crepery = new Restaurant('Crepery', cookerTypes.STOVE) \newline crepery.cook('crepes')} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Cooking cookies in the oven \newline Cooking crepes in the stove}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Functional Constructor}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{function Robot(name, job) \{ \newline    this.name = name \newline    this.job = job \newline    this.introduce = function () \{ \newline       console.log(`Name \$\{this.name\}`) \newline       console.log(`Job \$\{this.job\}`) \newline    \} \newline \} \newline  \newline const walle = new Robot('Wall-E', 'clean') \newline console.log(walle instanceof Robot) \newline walle.introduce()} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{true \newline Name Wall-E \newline Job clean}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Functional Inheritance (Liskov Substitution)}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{const Scientist = \{ \newline    init: function (name) \{ \newline       this.name = name \newline    \}, \newline  \newline    run\_experiment: function () \{ \newline       console.log(`\$\{this.name\} is running experiment`) \newline    \}, \newline \} \newline  \newline const MadScientist = \{ \newline    ...Scientist, \newline  \newline    run\_experiment: function () \{ \newline       const sabotage = !!Math.floor(Math.random() * 2) \newline       if (sabotage) \{ \newline          console.log(`\$\{this.name\} is sabotaging experiment!`) \newline       \} else \{ \newline          console.log(`\$\{this.name\} is running experiment`) \newline       \} \newline    \}, \newline \} \newline  \newline const neil = Object.create(Scientist) \newline neil.init('Neil') \newline  \newline const hubert = \seqsplit{Object.create(MadScientist)} \newline hubert.init('Hubert') \newline  \newline neil.run\_experiment() \newline hubert.run\_experiment()} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Neil will always return "Neil is running experiment" \newline Hubert will possibly return "Hubert is running experiment" or "Hubert is sabatoging experiment!"}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Open/Close Principle}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{function announce(collection) \{ \newline    \seqsplit{console.log(collection.description)} \newline  \newline    collection.logItems() \newline \} \newline  \newline var favoriteCities = \{ \newline    items: \{ \newline       Denmark: 'Copenhagen', \newline       Uganda: 'Kampala', \newline       Uraguay: 'Montevideo', \newline    \}, \newline  \newline    description: 'My favorite cities around the world:', \newline  \newline    logItems: function () \{ \newline       \seqsplit{Object.keys(this.items).forEach(function} (key) \{ \newline          console.log(this.items{[}key{]}) \newline       \}, this) \newline    \}, \newline \} \newline  \newline announce(favoriteCities)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{My favorite cities around the world: \newline Copenhagen \newline Kampala \newline Montevideo}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}