Name Rascal/Libraries/Prelude/ListRelation/index

Synopsis Listes a binary list relation as a map

Function map[&K, set[&V]] index(lrel[&K, &V] R)

Usage import ListRelation;

Description Converts a binary list relation to a map of the domain to a set of the range.

Examples

rascal>import ListRelation;
ok
rascal>index([<1,10>, <2,20>, <3,30>, <30,10>]);
map[int, set[int]]: (
  1:{10},
  2:{20},
  3:{30},
  30:{10}
)

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