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set empty
Chris Petersen edited this page Mar 24, 2016
·
1 revision
Check if a set is empty.
| Parameter | Description |
|---|---|
| s | Set |
> (define a (set-singleton 1 <))
> (set! a (set-remove 1 a))
> (set-empty? a)
#t
-
- 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