\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{Nima (nimakarimian)}
\pdfinfo{
  /Title (dart-vs-c.pdf)
  /Creator (Cheatography)
  /Author (Nima (nimakarimian))
  /Subject (Dart vs C++ Cheat Sheet)
}

% Lengths and widths
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\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
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\definecolor{FootBackground}{HTML}{666666}
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\definecolor{DarkBackground}{HTML}{2CA36B}
\definecolor{LightBackground}{HTML}{F1F9F5}
\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{Dart vs C++ Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Nima (nimakarimian)} via \textcolor{DarkBackground}{\uline{cheatography.com/113429/cs/22252/}}}
\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}Nima (nimakarimian) \\
  \uline{cheatography.com/nimakarimian} \\
        \uline{\seqsplit{www}.nimakarimian.ir}
  \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 2nd April, 2020.\\
   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}{C++ helloworld}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{int main() \{ \newline    cout \textless{}\textless{} "Hello World"; // prints Hello World \newline    return 0; \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{3.68 cm} x{4.32 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{C++ data types}}  \tn
% Row 0
\SetRowColor{LightBackground}
int & float \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
double & char \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
string & boolean \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{c++ is statically typed \newline 'type variable\_list;'}  \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}{c++ variables}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{type variable\_name = value; \newline int    i, j, k; \newline char   c, ch; \newline float  f, salary; \newline double d;} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{lvalue}} − Expressions that refer to a memory location is called "lvalue" expression. \newline {\bf{rvalue}} − The term rvalue refers to a data value that is stored at some address in memory.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{4 cm} p{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{C++ operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
= & == \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
+ & - \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
-{}- & ++ \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\% & * \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{/} \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{1.36 cm} x{6.64 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Storage Classes in C++}}  \tn
% Row 0
\SetRowColor{LightBackground}
auto & default storage class for all local variables \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\seqsplit{register} & used to define local variables that should be stored in a register instead of RAM. \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\seqsplit{static} & keep a local variable in existence during the life-time of the program instead of creating and destroying it each time \tn 
% Row Count 9 (+ 4)
% Row 3
\SetRowColor{white}
\seqsplit{extern} & is used to give a reference of a global variable that is visible to ALL the program files. \tn 
% Row Count 12 (+ 3)
% Row 4
\SetRowColor{LightBackground}
\seqsplit{mutable} & It allows a member of an object to override const member function(applies only to class objects) \tn 
% Row Count 15 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Dart helloworld}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{main() or (void main()) \newline \{  \newline    print("Hello World!");  \newline \}} \tn 
\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}{dart data types}}  \tn
% Row 0
\SetRowColor{LightBackground}
Number & strings \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
boolean & list \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{map} \tn 
% Row Count 3 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{lists are equivalent of arrays(ordered lists) \newline Maps represent a collection of objects, Map data type represents a set of values as key-value pairs. \newline {\bf{Dart is an optionally typed language. If the type of a variable is not explicitly specified, the variable's type is dynamic. The dynamic keyword can also be used as a type annotation explicitly.}}}  \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}{Dart variables}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{String name = 'Smith'; \newline dynamic x = "tom"; \newline final variable\_name; \newline const variable\_name;} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{-All uninitialized variables have an initial value of null. This is because Dart considers all values as objects. \newline -Variables declared without a {\bf{static}} type are implicitly declared as {\bf{dynamic}}. Variables can be also declared using the {\bf{dynamic}} keyword in place of the {\bf{var}} keyword. \newline -The final and const keyword are used to declare constants,  These keywords can be used together with the variable's data type or instead of the var keyword. \newline -The const keyword is a compile time const.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.88 cm} x{7.12 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Dart operators}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{in addition to c style operators} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
-expr & Unary minus, also known as negation (reverse the sign of the expression) \tn 
% Row Count 4 (+ 3)
% Row 2
\SetRowColor{LightBackground}
\textasciitilde{}/ & Divide, returning an integer result \tn 
% Row Count 5 (+ 1)
% Row 3
\SetRowColor{white}
is & it is \tn 
% Row Count 6 (+ 1)
% Row 4
\SetRowColor{LightBackground}
is! & it is not \tn 
% Row Count 7 (+ 1)
% Row 5
\SetRowColor{white}
??= & Assign the value only if the variable is null \tn 
% Row Count 9 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Dart for in loop}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{for (variablename in object)\{   \newline    statement or block to execute   \newline \}  \newline void main() \{  \newline    var obj = {[}12,13,14{]};  \newline     \newline    for (var prop in obj) \{  \newline       print(prop);  \newline    \}  \newline \}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}