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//! Map functionality.
use super::{Relation, Variable};
pub(crate) fn map_into<T1: Ord, T2: Ord>(
input: &Variable<T1>,
output: &Variable<T2>,
logic: impl FnMut(&T1) -> T2,
) {
let results: Vec<T2> = input.recent.borrow().iter().map(logic).collect();
output.insert(Relation::from_vec(results));
}
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