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function exists?
Peter Lewis edited this page Oct 1, 2020
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function-exists? tests if a function named obj exists.
Parameter | Description |
---|---|
obj | String or symbol to test for existence |
Example 1: Check if a function "s5-init", which is declared in a different module, exists to add a new monitor driver to an existing list of supported drivers.
(if (function-exists? "s5-init")
(eval '(monitor-add-driver (list "S/5" s5-init s5-run s5-close))))
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