chain<-previous

Did you know ...

Search Documentation:

chain<-previous

HOME
DOWNLOAD
DOCUMENTATION
- Manual
- Packages
- FAQ
- Command line
- PlDoc
- Bluffers▶
- License
- Publications
- Rev 7 Extensions
TUTORIALS
- Beginner▶
- Advanced▶
- Web applications▶
- Semantic web▶
  - ClioPatria
  - RDF namespaces
- Graphics▶
  - XPCE
  - GUI options
- Machine learning▶
  - Probabilistic Logic Programming
- External collections▶
  - Meta level tutorials
- For packagers▶
  - Linux packages
COMMUNITY
COMMERCIAL
WIKI
- Login
- View changes
- Sandbox
- Wiki help
- All tags

chain <-previous: [any] -> any

Returns the element right before the given argument. If the argument is not in the chain or the argument is the first member of the chain, this method fails. If the argument occurs multiple times in the chain, the element before the first appearance is returned. See also chain<-next, chain<-nth1, chain<-head and chain<-tail.