\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{addyosami}
\pdfinfo{
  /Title (ng2.pdf)
  /Creator (Cheatography)
  /Author (addyosami)
  /Subject (ng2 Cheat Sheet)
}

% Lengths and widths
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% 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
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% Font and Colours
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\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{ng2 Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{addyosami} via \textcolor{DarkBackground}{\uline{cheatography.com/33837/cs/10570/}}}
\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}addyosami \\
  \uline{cheatography.com/addyosami} \\
  \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 25th January, 2017.\\
   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{1.09494 cm} x{3.88206 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{@Component}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{template} & define template (using \textbackslash{}`) \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\seqsplit{templateUrl} & define template \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
host & the element in which a component is attached to \tn 
% Row Count 5 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{p{0.74655 cm} x{4.23045 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{helpers}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{(click)} & js default, propagates the `click` event to {\bf{all}} the parent components. So if want to not allow this, `return false` \tn 
% Row Count 4 (+ 4)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{syntax}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\textless{}inventory-app\textgreater{}\textless{}/inventory-app\textgreater{} // or \newline \textless{}div inventory-app\textgreater{}\textless{}/div\textgreater{} \newline  \newline input: {[}'name'{]}              // or \newline @Input() name: string // or \newline input: {[}'inside: outside'{]} // avoid \newline @Input('outside') inside: string // avoid \newline  \newline // set classes {\bf{conditionally}} \newline {[}class.selected{]}="isSelected(myProduct)" \newline  \newline // (p122/644) \newline src="\{\{product.imageUrl\}\} // wrong \newline {[}src{]}="product.imageUrl"  // right} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{best practices}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{use `template` when the view is not much \& vice versa. the drawback of using `template` is not having syntax hightlight} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{using the `host` option is nice because it means we can {\bf{encapsulate}} the `app-article` marup {\bf{within}} our component. By using the `host` option, we're able to configure our {\bf{host element}} from {\bf{within}} the component.} \tn 
% Row Count 8 (+ 5)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{{\bf{isolate}} the data structures from the component code} \tn 
% Row Count 10 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{{\bf{law of demeter}} a given object should assume as little as possible about the structure or properties of other objects} \tn 
% Row Count 13 (+ 3)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{link="http://weblog.jamisbuck.org/2006/10/18/skinny-controller-fat-model"\}\}{\bf{fat models, skinny controllers}} \{\{/link\}\}} \tn 
% Row Count 16 (+ 3)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{when buiding a new angular app, mockup the design \& then break it down into components} \tn 
% Row Count 18 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{normally, author wouldn't pass more than 5 arguments to a function.} \tn 
% Row Count 20 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{2.23965 cm} x{2.73735 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{cli}}  \tn
% Row 0
\SetRowColor{LightBackground}
watchman & OSX: `brew`, Linux: embercli, Window: native Nodejs watcher \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
ng new `app` & create a new ng2 app \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
ng serve & run app through `http` built in. `Window`: `-{}-host 0.0.0.0` \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
ng generate component `component` & create a new component \tn 
% Row Count 9 (+ 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}{resources}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{link="https://angular.io/docs/ts/latest/guide/style-guide.html"\}\}Angular Style Guide\{\{/link\}\}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{link="https://en.wikipedia.org/wiki/Observer\_pattern"\}\}Observer Pattern\{\{/link\}\}} \tn 
% Row Count 4 (+ 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}{terminology}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`\#newtitle`} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}is called `resolve`. makes the variable `newtitle` available to the {\bf{expressions}} within the {\bf{view}}. `newtitle` is an {\bf{object}} (typeof `HTMLInputElement`) that represents this `input` DOM element} \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`newtitle`} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}template variable} \tn 
% Row Count 8 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`Article{[}{]}` or `Array\textless{}Article\textgreater{}`} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}`generics`} \tn 
% Row Count 10 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`\{\{ \}\}`} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}template binding} \tn 
% Row Count 12 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`private currentProduct: Product`} \tn 
\mymulticolumn{1}{x{5.377cm}}{\hspace*{6 px}\rule{2px}{6px}\hspace*{6 px}local component state} \tn 
% Row Count 14 (+ 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}{knowledge}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{- one of the big ideas behind Angular is the idea of `components`. \{\{nl\}\}- the fundamental idea behind `components`: we'll teach the browser {\bf{new tags}} that have custom functionality.\{\{nl\}\}- `components` are the {\bf{new}} version of `directives` `ng-1`} \tn 
% Row Count 6 (+ 6)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{angular1's {\bf{dependency injection}} used the {\bf{annotation}} concept behind the scenes} \tn 
% Row Count 8 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{when boot an Angular app, you're not booting a component directly, but instead you create an `NgModule` which points to the component you want to load.} \tn 
% Row Count 12 (+ 4)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{you have to declare {\bf{components}} in a `NgModule` before you can use them in your templates} \tn 
% Row Count 14 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{Angular 1, {\bf{directives}} match globally. Angular 2, need to {\bf{explicitly}} specify {\bf{which components}} you want to use} \tn 
% Row Count 17 (+ 3)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{JavaScript, {\bf{by default}}, {\bf{propagates}} the `click` event to {\bf{all the parent components}}} \tn 
% Row Count 19 (+ 2)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`href=""` (empty link) === {\bf{reload page}}} \tn 
% Row Count 20 (+ 1)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{an angular2 is nothing more than a {\bf{tree}} of {\bf{components}}. {\bf{top level Component}} is the application itself.that's what the browser will render when {\bf{booting}} (a.k.a {\bf{bootstrapping}}) the app.} \tn 
% Row Count 25 (+ 5)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`@Component` annotation is where you configure your component. Primary, `@Component` will configure how the {\bf{outside world}} will interact with your component.} \tn 
% Row Count 29 (+ 4)
% Row 9
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{[}{]}`: `input`, `()`: `output`. \{\{nl\}\}{\bf{Data flows in}} to your component via {\bf{input bindings}} and {\bf{events flow out}} of your component through {\bf{output binding}}.\{\{nl\}\}Think of the set of {\bf{input}} + {\bf{output bindings}} as defining the {\bf{public API}} of your component.} \tn 
% Row Count 35 (+ 6)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{knowledge (cont)}}  \tn
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{In Angular, you send data out of components via {\bf{outputs}}.} \tn 
% Row Count 2 (+ 2)
% Row 11
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`(onProductSelected)`: the name of the {\bf{output}} we want to {\bf{listen}} on\{\{nl\}\}`productWasSelected`: the function we want to call when {\bf{something new}} is on this {\bf{output}}\{\{nl\}\}`\$event`: special variable that represents the thing emitted on the {\bf{output}}} \tn 
% Row Count 8 (+ 6)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{when we specify that a {\bf{component}} takes an {\bf{input}}, it is expected that the definition class will have {\bf{an instance variable}} that will receive the value} \tn 
% Row Count 12 (+ 4)
% Row 13
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`\textless{}button (click)="increase()"\textgreater{}Inc\textless{}/button\textgreater{}`\{\{nl\}\}In this case, the {\bf{event}} is {\bf{internal}} to the {\bf{component}}. we can also expose {\bf{public event}} (component `output`) that allow the component to talk to the {\bf{outside}} world} \tn 
% Row Count 17 (+ 5)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{An `EventEmitter` is simply {\bf{an object}} that helps you implement the `Observer Pattern`. That is, it's an object that can maintain a list of {\bf{subscribers}} and {\bf{publish}} events to them.} \tn 
% Row Count 21 (+ 4)
% Row 15
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{When we assign an `EventEmitter` to an {\bf{output}} Angular {\bf{automatically subscribes}} for us. But can add subscriptions by {\bf{our own}}.} \tn 
% Row Count 24 (+ 3)
% Row 16
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{every component must be declared in one `NgModule` before it can be used in a template} \tn 
% Row Count 26 (+ 2)
% Row 17
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{The {\bf{recommended way}} in Angular 2, and in many modern web frameworks (such as React), is to adopt a pattern of {\bf{one-way data binding}}. That is, your {\bf{data flows only down through components}}. If you need to {\bf{make changes}}, you {\bf{emit events}} that cause changes to happen {\bf{at the top}} which then trickle down.} \tn 
% Row Count 33 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}