Name Rascal/Libraries/Prelude/Relation/groupRangeByDomain

Synopsis Make sets of elements in the range that relate to the same element in the domain.

Function set[set[&T]] groupRangeByDomain(rel[&U dom, &T ran] input)

Usage import Relation;

Description

rascal>import Relation;
ok
rascal>skins = {<"bird", "feather">, <"dog", "fur">, <"tortoise", "shell">, <"human", "skin">, <"fish", "scale">, <"lizard", "scale">, <"crab", "shell">, <"cat", "fur">};
rel[str,str]: {
  <"fish","scale">,
  <"tortoise","shell">,
  <"lizard","scale">,
  <"human","skin">,
  <"cat","fur">,
  <"crab","shell">,
  <"dog","fur">,
  <"bird","feather">
}
rascal>groupRangeByDomain(skins);
set[set[str]]: {
  {"scale"},
  {"shell"},
  {"skin"},
  {"feather"},
  {"fur"}
}

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