\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{Martsys}
\pdfinfo{
  /Title (ruby.pdf)
  /Creator (Cheatography)
  /Author (Martsys)
  /Subject (Ruby 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}{000000}
\definecolor{LightBackground}{HTML}{F7F7F7}
\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{Ruby Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Martsys} via \textcolor{DarkBackground}{\uline{cheatography.com/77573/cs/19005/}}}
\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}Martsys \\
  \uline{cheatography.com/martsys} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 3rd March, 2019.\\
   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*}{3}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Arrays - Initializing}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}{[} 1 , 2 , 3 {]}                       \# =\textgreater{} {[}1, 2, 3{]}\{\{nl\}\}Array.new(2)                        \# =\textgreater{} {[}nil, nil{]} \{\{nl\}\}Array.new(5) \{ |i| i * 5 \}          \# =\textgreater{} {[}0, 5, 10, 15, 20{]} \{\{nl\}\}Array.new(2) \{ Array.new(2) \}              \# =\textgreater{} {[}{[}nil, nil{]}, {[}nil, nil{]}{]} \{\{nl\}\}ary = {[} {]}                           \# =\textgreater{} {[}{]} \{\{nl\}\}ary = Array.new                     \# =\textgreater{} {[}{]}\textasciicircum{}} \tn 
% Row Count 8 (+ 8)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{\textasciicircum{}\# initializing array of strings on whitespace\textasciicircum{}}}} \tn 
% Row Count 10 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}\%w(this that, and the other)  \{\{nl\}\}              \# =\textgreater{} {[}"this", "that,", "and", "the", "other"{]}\textasciicircum{}} \tn 
% Row Count 12 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Accessing and Assigning}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}ary = \%w(ruby python perl php javascript c)\{\{nl\}\}ary{[}0{]}                \# =\textgreater{} "ruby"\{\{nl\}\}ary{[}1{]}                \# =\textgreater{} "python"\{\{nl\}\}ary{[}2{]}                \# =\textgreater{} "perl"\{\{nl\}\}ary{[}3{]}                \# =\textgreater{} "php"\{\{nl\}\}ary{[}4{]} = 'ecmascript'\{\{nl\}\}ary  \# =\textgreater{} {[}"ruby", "python", "perl", "php", "ecmascript", "c"{]}\textasciicircum{}} \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{\textasciicircum{}\# negative indexes are applied from the end\textasciicircum{}}}} \tn 
% Row Count 7 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}ary{[}-1{]}               \# =\textgreater{} "c"\{\{nl\}\}ary{[}-2{]}               \# =\textgreater{} "ecmascript" \{\{nl\}\}ary{[}-3{]}               \# =\textgreater{} "php"\textasciicircum{}} \tn 
% Row Count 10 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{ \textasciicircum{}\# first and last\textasciicircum{}}}} \tn 
% Row Count 11 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}ary.first             \# =\textgreater{} "ruby"\{\{nl\}\}ary.last              \# =\textgreater{} "c"\textasciicircum{}} \tn 
% Row Count 13 (+ 2)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{\textasciicircum{}\# subarrays give a range, or a start index and length\textasciicircum{}}}} \tn 
% Row Count 15 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}ary                   \# =\textgreater{} {[}"ruby", "python", "perl", "php", "ecmascript", "c"{]}\{\{nl\}\}ary{[}0..2{]}             \# =\textgreater{} {[}"ruby", "python", "perl"{]}\{\{nl\}\}ary{[}-3..-1{]}           \# =\textgreater{} {[}"php", "ecmascript", "c"{]}\{\{nl\}\}ary{[}2, 3{]}              \# =\textgreater{} {[}"perl", "php", "ecmascript"{]}\textasciicircum{}} \tn 
% Row Count 21 (+ 6)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{\textasciicircum{}\# can replace a range of indexes with elements from an array (size doesn't need to match)\textasciicircum{}}}} \tn 
% Row Count 23 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}ary                   \# =\textgreater{} {[}"ruby", "python", "perl", "php", "ecmascript","c"{]}\{\{nl\}\}ary{[}1..2{]} = {[}9,8,7,6,5,4,3,2,1{]}\{\{nl\}\}ary \# =\textgreater{} {[}"ruby",9 8,7,6,5,4,3,2,1,"php,"ecmascript", "c"{]}\{\{nl\}\}ary = Array(0..10)    \# =\textgreater{} {[}0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10{]}\{\{nl\}\}ary.insert(5,'five')\{\{nl\}\}ary                   \# =\textgreater{} {[}0, 1, 2, 3, 4, "five", 5, 6, 7, 8, 9, 10{]}\textasciicircum{}} \tn 
% Row Count 30 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Sorting}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textasciicircum{}before = {[}3,6,3,0,8,235,-3{]} \newline after      = before.sort \newline before       \# =\textgreater{} {[}3, 6, 3, 0, 8, 235, -3{]} \newline after          \# =\textgreater{} {[}-3, 0, 3, 3, 6, 8, 235{]}\textasciicircum{}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}