How to do program with a grid-like layout.

There are several [Geometry managers] to use for the layout of a GUI:
   * [place]
   * [pack]
   * [grid]
 
   * [Comparing Geometry Managers]
   * [http://wiki.tcl.tk/38909%|%A Program In Tcl/Tk To Demonstrate The Three Geometry Managers : pack, grid and place]

...

Here are some nice, short programs already in the wiki,
that show ways to do such a layout:

   * [A small calculator] - uses grid
   * [A little calculator]
   * [A little spreadsheet]
 
   * [A simple memory game]
   * [A little Tic Tac Toe game]
 
   * [gridDemo-Pack]
   * [gridDemo-Place]
   * [gridDemo-grid]


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