Hash table figure with LaTeX/Tikz

hastable.tex

\begin{tikzpicture} [nodes={minimum width=0.8cm, minimum height=0.8cm},
         row sep=-\pgflinewidth, column sep=-\pgflinewidth]
   \matrix (hash)[matrix of nodes, nodes={draw, anchor=center}]
         {
       Key1 & Value1 \\
       Key2 & Value2 \\
       Key3 & Value3 \\
    };
\end{tikzpicture}