[Tex/LaTex] Limit spanning of hline like cline

tables

Is there a way to limit the length of a hline, so that it behaves like a cline?
What I want to achieve is to have the the double lines you will get, when calling \hline twice.

What I basically want is the following table without the first 'box' (7C0, 3700, 11111000000). And that the top, left, and bottom border of that column/row is removed.

sample table

Basically this MWE without the top and left border.

\documentclass{article}

\begin{document}
\begin{tabular}{|r|l|}
  \hline
  & hexadecimal \\
  & octal \\ \cline{2-2}
  & binary \\
  \hline \hline
  1984 & decimal \\
  \hline
\end{tabular}
\end{document}

Best Answer

If you only want the bottom half of the double line to extend to the first column you can use

enter image description here

\documentclass{article}
\usepackage{hhline}
\begin{document}
\begin{tabular}{r|l|}
  \hhline{~|-}
  & hexadecimal \\
  & octal \\ \cline{2-2}
  & binary \\
  \hhline{-:=}
  \multicolumn{1}{|r|}{1984} & decimal \\
  \hline
\end{tabular}
\end{document}
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