The Table is at the heart of Planarly

The basic unit in the Planarly programming language is the table. A table is a 2 dimensional rectangular grid of values. The smallest table is a 1x1 table - a single cell.

A table is an abstract data structure. Don't confuse it with the grid of cells in a spreadsheet. In Planarly that is called a Region, which will be covered shortly.

Values in a table can be one of the following types:

• Blank: a special value held by empty cells.
• Boolean: True and False
• 64 bit integer: e.g. 1234.
• 64 bit double precision floating point: e.g. 4.0
• A UTF8 string of arbitrary length: e.g. "a string" evaluates to a 8 character string.
• TODO a binary blob with a MIME type

Tables can contain any combination of types.

The dimensions of a table are always written as (height, width) which is (rows, columns).

Representing tables in code

Almost everything in Planarly is a table. E.g. 1 is a table of dimension 1x1 and its only cell contains the value 1.

The operator & concatenates two tables side by side and the operator \\\\ stacks one table on top of another. & has a higher precedence than \\\\. This allows you to construct inline tables :

• 1 & 2 \\\\ 3 & 4 evaluates to:

$$ \begin{array}{c|c} 1 & 2 \\ \hline 3 & 4 \end{array} $$

• "background" & ("yellow" & "gray") evaluates to:

$$ \begin{array}{c|c|c} background & yellow & gray\\

\end{array} $$

• "background & ( "yellow" \\\\ "gray" ) evaluates to: