如何在表格环境中缩短命令？

Question

列表如下。

\begin{tabular}{|>{\centering\arraybackslash}m{2cm}|>{\centering\arraybackslash}m{7cm}|>{\centering\arraybackslash}m{1cm}|}
        \hline
        \textbf{Keys} & \textbf{Description} & \textbf{Type}
\end{tabular}

我想以某种方式缩短命令

**{|>{\centering\arraybackslash}m{2cm}|>{\centering\arraybackslash}m{7cm}|>{\centering\arraybackslash}m{1cm}|}**

变成一些短命令，例如**\firststyle**，所以我不需要一直复制长字符串。

\begin{tabular} {\firststyle}
        \hline
        \textbf{Keys} & \textbf{Description} & \textbf{Type}
\end{tabular}

Answer 1

使用\newcolumntypefromarray包，您可以定义新的列类型，带或不带参数。请参阅包装文档。

\documentclass{article}
\usepackage{array}
\newcolumntype{M}[1]{>{\centering\arraybackslash}m{#1}}
\newcolumntype{A}{|M{2cm}|M{7cm}|M{1cm}|}

\begin{document}
You can define a column type with a parameter:

\begin{tabular}{|M{2cm}|M{7cm}|M{1cm}|}
        \hline
        \textbf{Keys} & \textbf{Description} & \textbf{Type}
\end{tabular}

You can even define a unique column type for all the columns of your table:

\documentclass{article}
\usepackage{array}
\newcolumntype{M}[1]{>{\centering\arraybackslash}m{#1}}
\newcolumntype{A}{|M{2cm}|M{7cm}|M{1cm}|}

\begin{document}
You can define a column type with a parameter:

\begin{tabular}{|M{2cm}|M{7cm}|M{1cm}|}
        \hline
        \textbf{Keys} & \textbf{Description} & \textbf{Type}
\end{tabular}

I don't know how much this is orthodox, but you can even define a unique column type for all the columns of your table:

\begin{tabular}{A}
        \hline
        \textbf{Keys} & \textbf{Description} & \textbf{Type}
\end{tabular}
\end{document}