\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{williamyaoh} \pdfinfo{ /Title (regex-tdfa.pdf) /Creator (Cheatography) /Author (williamyaoh) /Subject (regex-tdfa 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}{8A0D8E} \definecolor{LightBackground}{HTML}{F7EFF7} \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{regex-tdfa Cheat Sheet}}}} \\ \normalsize{by \textcolor{DarkBackground}{williamyaoh} via \textcolor{DarkBackground}{\uline{cheatography.com/78742/cs/19172/}}} \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}williamyaoh \\ \uline{cheatography.com/williamyaoh} \\ \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 22nd 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}{Importing and Using}} \tn \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{dependencies: \newline - regex-tdfa \newline - regex-tdfa-text \newline \newline import Text.Regex.TDFA \newline import Text.Regex.TDFA.Text ()} \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}{Basic Usage}} \tn \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{\textless{}to-match-against\textgreater{} =\textasciitilde{} \textless{}regex\textgreater{} -{}- non-monadic, gives some reasonable 'default' if no match \newline \textless{}to-match-against\textgreater{} =\textasciitilde{}\textasciitilde{} \textless{}regex\textgreater{} -{}- monadic, calls `fail' on no match \newline \newline "my email is email@email.com" =\textasciitilde{} "{[}a-zA-Z0-9\_\textbackslash{}\textbackslash{}-{]}+@{[}a-zA-Z0-9\textbackslash{}\textbackslash{}-{]}+\textbackslash{}\textbackslash{}.{[}a-zA-Z0-9{]}+"} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{`(=\textasciitilde{})` and `(=\textasciitilde{}\textasciitilde{})` are polymorphic in their return type, so you may need to specify the type explicitly if GHC can't infer it. This is a little inconvenient sometimes, but allows the matching operators to be used in a lot of different situations. For example, it can return a `Bool`, if all you need is to check whether the regex matched; it can return a list of the matched strings; or it can return a list of the match indices and lengths, depending on what you need.} \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}{Basic Usage}} \tn \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{a =\textasciitilde{} b -{}- a and b can both be any of String, Text, or ByteString \newline "foo-bar" =\textasciitilde{} "{[}a-z{]}+" :: String -{}- or Text, ByteString... \newline \textgreater{}\textgreater{}\textgreater{} "foo"} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{`regex-tdfa` only supports String and ByteString by default; `regex-tdfa-text` provides the instances for Text.} \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}{Common use cases}} \tn \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{a =\textasciitilde{} b :: Bool -{}- did it match at all? \newline a =\textasciitilde{} b :: (String, String, String) \newline -{}- the text before the match, the match itself, and the text after the match \newline a =\textasciitilde{} b :: (String, String, String, {[}String{]}) \newline -{}- same as above, plus a list of {\emph{only}} submatches} \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}{Advanced usage}} \tn \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{getAllTextMatches (a =\textasciitilde{} b) :: {[}String{]} \newline getAllMatches (a =\textasciitilde{} b) :: {[}(Int, Int){]} \newline \newline getAllTextSubmatches (a =\textasciitilde{} b) :: {[}String{]} \newline -{}- the {\emph{first}} element of this list will be the match of the whole regex \newline getAllSubmatches (a =\textasciitilde{} b) :: {[}(Int, Int){]}} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \SetRowColor{LightBackground} \mymulticolumn{1}{x{5.377cm}}{For these functions, we can also request an Array as the return value instead of a List (again, through polymorphism).} \tn \hhline{>{\arrayrulecolor{DarkBackground}}-} \end{tabularx} \par\addvspace{1.3em} % That's all folks \end{multicols*} \end{document}