Function Repository Resource:

RunBeforeLoading

Source Notebook

Evaluate an expression when a package is first loaded

Contributed by: Richard Hennigan (Wolfram Research)

ResourceFunction["RunBeforeLoading"][code,"context`"]

creates an event handler that evaluates code when "context`" is first loaded.

Examples

Basic Examples (2)

Print a message when a context is first loaded:

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$ResourceFunction["RunBeforeLoading"][ Print["Loading ComputerArithmetic`\[Ellipsis]"], "ComputerArithmetic`"]$

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Check to see what file is used to load a paclet:

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Scope (2)

Retrieve the ResourceFunction:

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Retrieve the ResourceObject:

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Possible Issues (2)

An auto-loading context that is already loaded will no longer trigger the loading event:

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Run in a new session instead:

In[9]:=

(* Evaluate this cell to get the example input *) CloudGet["https://www.wolframcloud.com/obj/06e10326-eea2-4da7-b046-08f7651dc5e2"]

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Requirements

Wolfram Language 11.3 (March 2018) or above

Version History

1.0.0 – 17 August 2018

License Information

This work is licensed under a Creative Commons Attribution 4.0 International License