\documentclass[10pt,a4paper]{article}

% Packages
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\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{rictomm}
\pdfinfo{
  /Title (fluxlang-101.pdf)
  /Creator (Cheatography)
  /Author (rictomm)
  /Subject (FluxLang 101 Cheat Sheet)
}

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\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
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% Header and Footer
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\fancyhead{} % Set header to blank
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\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{FluxLang 101 Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{rictomm} via \textcolor{DarkBackground}{\uline{cheatography.com/165543/cs/34657/}}}
\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}rictomm \\
  \uline{cheatography.com/rictomm} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 13th October, 2022.\\
   Updated 13th October, 2022.\\
   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

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% 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{1.8 cm} x{1.224 cm} x{1.8 cm} x{2.376 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{4}{x{8.4cm}}{\bf\textcolor{white}{A Table of Measure}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{Measurement}} & {\bf{Sensor}} & {\bf{Temperature}} & {\bf{Timestamp}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
iot-oven & S1 & 290 & \seqsplit{1633953600000000000} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
iot-oven & S2 & 105 & \seqsplit{1633953615000000000} \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
iot-oven & S1 & 305 & \seqsplit{1633953660000000000} \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
iot-oven & S2 & 120 & \seqsplit{1633953675000000000} \tn 
% Row Count 10 (+ 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}{Basic Filtering}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{from(bucket: "training") \newline   |\textgreater{} range(start: v.timeRangeStart, stop: v.timeRangeStop) \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_measurement == "iot-oven") \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_field == "temperature") \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.sensor == "S2") \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_value \textless{} 100)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{The {\bf{range}} clause allows to filter by time creating a time windodw \newline The {\bf{filter}} clause reduces the ammount of records and can be applied on the measurements, fields, tags, and field/tag keys.}  \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}{Functions}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Flux transformations take a stream of tables as input, transform the data in some way, and output a stream of tables.% Row Count 3 (+ 3)
} \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}{Aggregation}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{from(bucket: "training") \newline   |\textgreater{} range(start: v.timeRangeStart, stop: v.timeRangeStop) \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_measurement == "iot-oven") \newline   |\textgreater{} group(columns: {[}"\_field"{]}) \newline   |\textgreater{} mean()} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Flux aggregate functions are transformations aggregate values from input tables in some way.}  \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}{Selector}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{from(bucket: "training") \newline   |\textgreater{} range(start: v.timeRangeStart, stop: v.timeRangeStop) \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_measurement == "iot-oven") \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.sensor == "S1") \newline   |\textgreater{} group(columns: {[}"\_field"{]}) \newline   |\textgreater{} last()} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Flux selector functions are transformations that return one or more record per input table.}  \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}{Conditional Expressions}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{... |\textgreater{} map(fn: (r) =\textgreater{} (\{ \newline       r with \_value: \newline                     if r.\_value == true then 1 \newline                     else 0  \}))} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Conditional expressions evaluate a boolean-valued condition. If the result is true, the expression that follows the then keyword is evaluated and returned.}  \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}{Line Protocol}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/rictomm_1665673418_lineprotoocl.png}}} \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}{Advanced Windowing}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{from(bucket: "training") \newline   |\textgreater{} range(start: v.timeRangeStart, stop: v.timeRangeStop) \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_measurement == "iot-oven") \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_field == "temperature") \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.sensor == "S1") \newline   |\textgreater{} aggregateWindow(every: 2m, fn: mean)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{aggregateWindow() downsamples data by grouping data into fixed windows of time and applying an aggregate or selector function to each window. \newline  \newline {\bf{NOTE}} The flag `createEmpty: false` can be used to consider only the windows that contains data (its default value is `true`)}  \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}{Map and Custom Functions}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{from(bucket: "training") ...   \newline         |\textgreater{} map(fn: (r) =\textgreater{} (\{ r with correctValue: r.\_value - 5.0 \}))} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{Note}} the `r with` clause maintains alla the original columns and adds the new one.}  \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}{Custom pipe forwardable function}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{adjValues = (tables=\textless{}-, x) =\textgreater{} \newline   tables \newline     |\textgreater{} map(fn: (r) =\textgreater{} (\{ r with correctValue: r.\_value + x\})) \newline  \newline from(bucket: "training") \newline   |\textgreater{} range(start: v.timeRangeStart, stop: v.timeRangeStop) \newline   |\textgreater{} filter(fn: (r) =\textgreater{} r.\_measurement == "iot-oven") \newline   |\textgreater{} adjValues(x:-5.0)} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Most Flux functions manipulate data piped-forward into the function. In order for a custom function to process piped-forward data, one of the function parameters must capture the input tables using the `\textless{}-` pipe-receive expression.}  \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}{Joins}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{from(bucket: "training") \newline ... \newline join(tables: \{s1: hs1, s2: hs2\}, on: {[}"\_time"{]}, method: "inner")} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{The join() function merges two or more input streams, whose values are equal on a set of common columns, into a single output stream.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


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

\end{document}