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Turns out, collect is the answer

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This commit is contained in:
Griffin Smith 2019-07-28 21:16:20 -04:00
parent 8f3c83311f
commit 10fb09eca2
1 changed files with 8 additions and 15 deletions
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23
src/types/entity_map.rs
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@ -42,21 +42,14 @@ impl<A> EntityMap<A> {
/// Returns a list of all entities at the given position
pub fn at<'a>(&'a self, pos: Position) -> Vec<&'a A> {
// self.by_position.get(&pos).iter().flat_map(|eids| {
// eids.iter()
// .map(|eid| self.by_id.get(eid).expect(BY_POS_INVARIANT))
// })
// gross.
match self.by_position.get(&pos) {
None => Vec::new(),
Some(eids) => {
let mut res = Vec::new();
for eid in eids {
res.push(self.by_id.get(eid).expect(BY_POS_INVARIANT));
}
res
}
}
self.by_position
.get(&pos)
.iter()
.flat_map(|eids| {
eids.iter()
.map(|eid| self.by_id.get(eid).expect(BY_POS_INVARIANT))
})
.collect()
}
/// Remove all entities at the given position