Name Rascal/Libraries/Prelude/ListRelation/domain

Synopsis Domain of a list relation: a list consisting of the first element of each tuple.

Function

1. list[&T0] domain (lrel[&T0,&T1] R)
2. list[&T0] domain (lrel[&T0,&T1,&T2] R)
3. list[&T0] domain (lrel[&T0,&T1,&T2,&T3] R)
4. list[&T0] domain (lrel[&T0,&T1,&T2,&T3,&T4] R)

Usage import ListRelation;

Examples

rascal>import ListRelation;
ok
rascal>domain([<1,10>, <2,20>]);
list[int]: [1,2]
rascal>domain([<"mon", 1>, <"tue", 2>]);
list[str]: ["mon","tue"]

Questions

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