\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{Mackan90096 (Mackan90096)}
\pdfinfo{
  /Title (json.pdf)
  /Creator (Cheatography)
  /Author (Mackan90096 (Mackan90096))
  /Subject (JSON 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}{49A34C}
\definecolor{LightBackground}{HTML}{F3F9F3}
\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{JSON Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Mackan90096 (Mackan90096)} via \textcolor{DarkBackground}{\uline{cheatography.com/20748/cs/3634/}}}
\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}Mackan90096 (Mackan90096) \\
  \uline{cheatography.com/mackan90096} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 9th March, 2015.\\
   Updated 12th May, 2016.\\
   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}{p{0.4577 cm} x{1.96811 cm} x{2.15119 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{5.377cm}}{\bf\textcolor{white}{Data Types}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{number} & var myNum = 123.456; & Series of numbers; decimals ok; double-precision floating-point format \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\seqsplit{string} & var myString = "abcdef"; & Series of characters (letters, numbers, or symbols); double-quoted UTF-8 with backslash escaping \tn 
% Row Count 10 (+ 6)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{boolean} & var myBool = true; & true or false \tn 
% Row Count 12 (+ 2)
% Row 3
\SetRowColor{white}
array & var myArray = {[} "a", "b", "c", "d" {]}; & sequence of comma-separated values (any data type); enclosed in square brackets \tn 
% Row Count 17 (+ 5)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{object} & var myObject = \{ "id": 7 \}; & unordered collection of comma-separated key/value pairs; enclosed in curly braces; properties (keys) are distinct strings \tn 
% Row Count 24 (+ 7)
% Row 5
\SetRowColor{white}
null & var myNull = null; & variable with null (empty) value \tn 
% Row Count 26 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\seqsplit{undefined} & var myUndefined; & variable with no value assigne \tn 
% Row Count 29 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Objects}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{var myObject = \{ \newline   "first": "John", \newline   "last": "Doe", \newline   "age": 39, \newline   "sex": "male", \newline   "salary": 70000, \newline   "registered": true \newline \};} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.53827 cm} x{2.43873 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Access object properties}}  \tn
% Row 0
\SetRowColor{LightBackground}
myObject.sex & returns "male" \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
myObject{[}"age"{]} & returns 39 \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
myObject{[}0{]} & returns "John" \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
myObject.something & returns undefined \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
myObject{[}6{]} & returns undefined \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Array of objects}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{var myArray = {[} \newline   \{ \newline     "first": "John", \newline     "last": "Doe", \newline     "age": 39, \newline     "sex": "male", \newline     "salary": 70000, \newline     "registered": true \newline   \}, \newline   \{ \newline     "first": "Jane", \newline     "last": "Smith", \newline     "age": 42, \newline     "sex": "female", \newline     "salary": 80000, \newline     "registered": true \newline   \}, \newline   \{ \newline     "first": "Amy", \newline     "last": "Burnquist", \newline     "age": 29, \newline     "sex": "female", \newline     "salary": 60000, \newline     "registered": false \newline   \} \newline {]};} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.69218 cm} x{3.28482 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Access array elements}}  \tn
% Row 0
\SetRowColor{LightBackground}
myArray{[}0{]} & returns \{ "fist": "John", "last": "Doe" ... \} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
myArray{[}1{]} & returns \{ "fist": "Jane", "last": "Smith" ... \} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
myArray{[}1{]}.first & returns "Jane" \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
myArray{[}1{]}{[}2{]} & returns 42 \tn 
% Row Count 7 (+ 1)
% Row 4
\SetRowColor{LightBackground}
myArray{[}2{]}.registered & returns false \tn 
% Row Count 9 (+ 2)
% Row 5
\SetRowColor{white}
myArray{[}3{]} & returns undefined \tn 
% Row Count 10 (+ 1)
% Row 6
\SetRowColor{LightBackground}
myArray{[}3{]}.sex & error: "cannot read property..." \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}{Arrays}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{var myArray = {[} \newline   "John", \newline   "Doe", \newline   39, \newline   "M", \newline   70000, \newline   true \newline {]};} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.84149 cm} x{3.13551 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Access array elements}}  \tn
% Row 0
\SetRowColor{LightBackground}
myArray{[}1{]} & returns "Doe" \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
myArray{[}5{]} & returns true \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
myArray{[}6{]} & returns undefined \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{Nested objects and arrays}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{var myObject = \{ \newline   "ref": \{ \newline     "first": 0, \newline     "last": 1, \newline     "age": 2, \newline     "sex": 3, \newline     "salary": 4, \newline     "registered": 5 \newline   \}, \newline   "jdoe1": {[} \newline     "John", \newline     "Doe", \newline     39, \newline     "male", \newline     70000, \newline     true \newline   {]}, \newline   "jsmith1": {[} \newline     "Jane", \newline     "Smith", \newline     42, \newline     "female", \newline     80000, \newline     true \newline   {]} \newline \};} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.43873 cm} x{2.53827 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{Access nested elements}}  \tn
% Row 0
\SetRowColor{LightBackground}
myObject.ref.first & returns 0 \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
myObject.jdoe1 & returns {[} "John", "Doe", 39 ... {]} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
myObject{[}2{]} & returns {[} "Jane", "Smith", 42 ... {]} \tn 
% Row Count 5 (+ 2)
% Row 3
\SetRowColor{white}
myObject.jsmith1{[}3{]} & returns "female" \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
myObject{[}1{]}{[}5{]} & returns true \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
myObject.jdoe1{[}myObject.ref.last{]} & returns "Doe" \tn 
% Row Count 9 (+ 2)
% Row 6
\SetRowColor{LightBackground}
myObject.jsmith1{[}myObject.ref.age{]} & returns 42 \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}