SWI-Prolog -- dicts_join/3

Did you know ...

Search Documentation:

Predicate dicts_join/3

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

Documentation
- Reference manual
  - The SWI-Prolog library
    - library(dicts): Dict utilities
- Packages

Availability::- use_module(library(dicts)).(can be autoloaded)

Source

[semidet]dicts_join(+Key, +DictsIn, -Dicts)

Join dicts in Dicts that have the same value for Key, provided they do not have conflicting values on other keys. For example:

?- dicts_join(x, [r{x:1, y:2}, r{x:1, z:3}, r{x:2,y:4}], L).
L = [r{x:1, y:2, z:3}, r{x:2, y:4}].

Errors: existence_error(key, Key, Dict) if a dict in Dicts1 or Dicts2 does not contain Key.