Create command for a width

Question

How can I put this code into command to be more organized and precise?

Answer 1

You can use a columntype for that:

\documentclass{article}

\usepackage{tabu,longtable}
\newcounter{myrow}
\newcommand\mybox{\fbox{X}}
\newcolumntype{Y}{>{\stepcounter{myrow}\themyrow.}l
X[3]
@{\hspace{2em}}
>{\mybox}l
@{\hspace{4pt}}
X}


\begin{document}

\begin{longtabu} to \textwidth{Y}
&
sometext
&&
some long text some long text some long text some long text 
\end{longtabu}

\end{document}