function exists?
Peter Lewis edited this page Oct 1, 2020
·
4 revisions
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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- accelerometer
- alist
- audio
- audioaux
- base64
- btle-scan
- camera
- cdb
- cgi
- config
- csv
- curl
- digest
- dmtx
- download
- eventloop
- fcgi
- fft
- generalized-arrays
- gps
- graph
- gyro
- hidapi
- hpdf
- html
- httpsclient
- hybridapp
- json
- lmdb
- ln_core
- ln_glcore
- ln_glgui
- ln_store
- localization
- localization_gui
- localnotification
- magnetometer
- mdns
- mqtt
- mqtt-store
- multitouch
- oauth
- orientation
- p256ecdsa
- png
- portaudio
- pregexp
- pressure
- prime
- pushnotification
- redcap
- rsa
- rtaudio
- rupi
- rotation
- sanestring
- scheduler
- serial
- sets
- settings
- simplexnoise
- sqlite
- ssax
- syntax-case
- timestamp
- ttf
- uiform
- url
- uuid
- vibrate
- videoplayer
- watchdog
- website
- xml
- zip