\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{peterwn123}
\pdfinfo{
  /Title (angular-typescript-javascript.pdf)
  /Creator (Cheatography)
  /Author (peterwn123)
  /Subject (Angular/Typescript/Javascript 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}{A36FA1}
\definecolor{LightBackground}{HTML}{F9F6F9}
\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{Angular/Typescript/Javascript Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{peterwn123} via \textcolor{DarkBackground}{\uline{cheatography.com/41836/cs/12642/}}}
\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}peterwn123 \\
  \uline{cheatography.com/peterwn123} \\
  \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 April, 2018.\\
   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{3.52 cm} x{4.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Javascript}}  \tn
% Row 0
\SetRowColor{LightBackground}
Find text in strings & `"Hello \seqsplit{world".includes("world");} // True` \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
String to Int & `var a = parseInt("10")` \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Int to String & `value.toString()` or `"" + value` or `String(value)` \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
Switch statement & `switch(expression) \{\{\{nl\}\}~~~~case n:\{\{nl\}\}~~~~~~~~code block\{\{nl\}\}~~~~~~~~break;\{\{nl\}\}~~~~default:\{\{nl\}\}~~~~~~~~code block\{\{nl\}\}\}` \tn 
% Row Count 21 (+ 14)
% Row 4
\SetRowColor{LightBackground}
declare var as function & `var a: Function` \tn 
% Row Count 23 (+ 2)
% Row 5
\SetRowColor{white}
call object method as parameter & `function bar(obj: Foo, func: string) \{\{\{nl\}\}~~~~obj{[}func{]}(); \}` \tn 
% Row Count 27 (+ 4)
% Row 6
\SetRowColor{LightBackground}
Find string in array of strings & `var strs = {[}'abc', 'def', 'ghi'{]};\{\{nl\}\}strs.find(str =\textgreater{} \{\{\{nl\}\}~~~~return str === 'abc'\{\{nl\}\}\} );` \tn 
% Row Count 33 (+ 6)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.52 cm} x{4.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Javascript (cont)}}  \tn
% Row 7
\SetRowColor{LightBackground}
Creating a Promise & `myProm = new Promise((res, rej) =\textgreater{} \{\{\{nl\}\}~~~~// something asynchronous then call:\{\{nl\}\}~~~~res(someValue); // or\{\{nl\}\}~~~~rej("failure reason");\{\{nl\}\}\})` \tn 
% Row Count 10 (+ 10)
% Row 8
\SetRowColor{white}
Creating an Observable & `let obs = Observable.create(obs =\textgreater{} \{\{\{nl\}\}~~~~setTimeout(() =\textgreater{} \{\{\{nl\}\}~~~~~~~~obs.next("data to send");\{\{nl\}\}~~~~~~~~console.log("am done");\{\{nl\}\}~~~~~~~~obs.complete();// we are done\{\{nl\}\}~~~~~~~~// obs.error(new Error("msg"));\{\{nl\}\}~~~~\}, 2000);\{\{nl\}\}\})` \tn 
% Row Count 31 (+ 21)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.52 cm} x{4.48 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Javascript (cont)}}  \tn
% Row 9
\SetRowColor{LightBackground}
Loop through object & `for (const v of Object.keys(vs)) \{\{\{nl\}\}~~~~r.push(vs{[}v{]}) \}` \tn 
% Row Count 4 (+ 4)
% Row 10
\SetRowColor{white}
Parse string to object & `JSON.parse()` \tn 
% Row Count 6 (+ 2)
% Row 11
\SetRowColor{LightBackground}
Is variable an array & `Array.isArray()` \tn 
% Row Count 8 (+ 2)
% Row 12
\SetRowColor{white}
case statement & `switch(expression) \{\{\{nl\}\}~~~~case n:\{\{nl\}\}~~~~~~~~code block\{\{nl\}\}~~~~~~~~break;\{\{nl\}\}~~~~default:\{\{nl\}\}~~~~~~~~code block\{\{nl\}\} \}` \tn 
% Row Count 22 (+ 14)
% Row 13
\SetRowColor{LightBackground}
Test for empty object & \seqsplit{`Object.keys(obj).length} === 0` \tn 
% Row Count 24 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.04 cm} x{4.96 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Angular CLI}}  \tn
% Row 0
\SetRowColor{LightBackground}
Build in test mode & `ng build -{}-environment=test` \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Start server & `lite-server` \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
lite-server configuration & `"files": {[}"./dist/*.\{js\}"{]},    \{\{nl\}\} "server": \{ "baseDir": "./dist" \} ` \tn 
% Row Count 7 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Angular}}  \tn
% Row 0
\SetRowColor{LightBackground}
`@NgModule(\{\{\{nl\}\}~~~~providers\{\{nl\}\}~~~~declarations\{\{nl\}\}~~~~imports\{\{nl\}\}\{\{nl\}\}~~~~exports\{\{nl\}\}\{\{nl\}\}~~~~entryComponents\{\{nl\}\}\{\{nl\}\}~~~~bootstrap\{\{nl\}\}\{\{nl\}\}~~~~schemas\{\{nl\}\}~~~~id\{\{nl\}\}\})` & \{\{nl\}\}- injectable objects, can appear in the constructor\{\{nl\}\}- list of directives/pipes\{\{nl\}\}- list of modules whose exported directives/pipes should be available to templates in this module\{\{nl\}\}- \seqsplit{directives/pipes/modules} used in template of components part of module importing this module\{\{nl\}\}- list of components that should be compiled when this module is defined\{\{nl\}\}- components that should be bootstrapped when this module is bootstrapped\{\{nl\}\} \tn 
% Row Count 23 (+ 23)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.84 cm} x{4.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Python}}  \tn
% Row 0
\SetRowColor{LightBackground}
Ternary operator & `a if condition else b` \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Remove array element & `remove first matching value\{\{nl\}\}{[}0, 2, 3, 2{]}.remove(2) =\textgreater{} {[}0, 3, 2{]} \{\{nl\}\}remove a specific index \{\{nl\}\}{[}3, 2, 2, 1{]}.del a{[}1{]} =\textgreater{} {[}3, 2, 1{]} \{\{nl\}\}return the removed element \{\{nl\}\}{[}4, 3, 5{]}.pop(1) returns 3 =\textgreater{} {[}4, 5{]}` \tn 
% Row Count 13 (+ 11)
% Row 2
\SetRowColor{LightBackground}
Item in list & `someElement in someList` \tn 
% Row Count 15 (+ 2)
% Row 3
\SetRowColor{white}
Print tuple & `print "\{0\}, \{1\}, \{2\}".format(*{[}1, 2, 3{]})` \tn 
% Row Count 18 (+ 3)
% Row 4
\SetRowColor{LightBackground}
Flatten tuple & `{[}el for tup in ((1, 2), (3,)) for el in tup{]}\{\{nl\}\}=\textgreater{} {[}1, 2, 3{]}` \tn 
% Row Count 22 (+ 4)
% Row 5
\SetRowColor{white}
Index in list & `{[}"foo", "bar", "baz"{]}.index("bar")` \tn 
% Row Count 24 (+ 2)
% Row 6
\SetRowColor{LightBackground}
regex replace & `re.sub(pattern, repl, string, count=0, flags=0)` \tn 
% Row Count 27 (+ 3)
% Row 7
\SetRowColor{white}
print array & `print ', '.join(names)` \tn 
% Row Count 29 (+ 2)
% Row 8
\SetRowColor{LightBackground}
for loop with index & `for idx, val in enumerate(list):` \tn 
% Row Count 31 (+ 2)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{8.4cm}{x{3.84 cm} x{4.16 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Python (cont)}}  \tn
% Row 9
\SetRowColor{LightBackground}
for in - val is the value (not index) & `for val in list` \tn 
% Row Count 2 (+ 2)
% Row 10
\SetRowColor{white}
int to string & `str(number)` \tn 
% Row Count 3 (+ 1)
% Row 11
\SetRowColor{LightBackground}
find substring & \seqsplit{`string.find('substring')`} \tn 
% Row Count 5 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.36 cm} x{4.64 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{HTML}}  \tn
% Row 0
\SetRowColor{LightBackground}
Cast Elements to HTMLElements & `elems  as HTMLCollectionOf\textless{}HTMLElement\textgreater{}` \tn 
% Row Count 2 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}