public static IList project(IList rel1, int... fields) {
IListWriter w = ValueFactory.getInstance().listWriter();
for (IValue v : rel1) {
w.append(((ITuple) v).select(fields));
}
return w.done();
}
public boolean isEqual(IValue value) {
if (value == this) return true;
if (value == null) return false;
if (value instanceof Set) {
Set otherSet = (Set) value;
return data.isEqual(otherSet.data);
} else if (value instanceof ISet) {
return SetFunctions.isEqual(ValueFactory.getInstance(), this, (ISet) value);
}
return false;
}
