如何在表格環境中縮短指令？

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}

我想以某種方式縮短命令

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

進入一些短命令，例如**\firststyle**，所以我不需要一直複製長字串。

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

Answer 1

使用\newcolumntypefromarray包，您可以定義新的列類型，有或沒有參數。請參閱第 1.1 節包文件。

\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}