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The module Cell contains procedures operating on cells.
IsCell
{Cell.is+X?B}
tests whether X is a cell.
NewCell
{Cell.newX?Cell}
returns a new cell with initial content X.
Exchange
{Cell.exchange+CellXY}
returns the current content of Cell in X, and sets the content of Cell to Y.
Access
{Cell.access+CellX}
returns the current content of Cell in X.
Assign
{Cell.assign+CellX}
sets the content of Cell to X.
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