CellProlog

CellProlog
is an option to Cell that gives an expression to evaluate before each ordinary evaluation of the contents of the cell.

DetailsDetails

  • CellProlog:>expr evaluates expr for every ordinary kernel evaluation done in the cell, as initiated for example by Shift+Enter or by Evaluate in Place.
  • CellProlog is not evaluated for evaluations associated with Dynamic objects.
  • The default setting is CellProlog->None.
  • CellProlog is often set at a style or notebook level, rather than for individual cells.

ExamplesExamplesopen allclose all

Applications (2)Applications (2)

Rules for temporarily setting $Post:

In[1]:=
Click for copyable input

Rules for setting up local package contexts for a cell:

In[1]:=
Click for copyable input
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