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use iter once.chain(once).flatten trick to deduplicate SiteInfo generation

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This commit is contained in:
Christof Petig 2020-11-23 23:28:21 +01:00
parent 49d7c40bec
commit 4563cb40ce
1 changed files with 9 additions and 13 deletions
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22
world/src/lib.rs
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@ -118,20 +118,16 @@ impl World {
self.civs()
.caves
.iter()
.map(|(_, info)| world_msg::SiteInfo {
name: Some(info.name.clone()),
.map(|(_, info)| {
// separate the two locations, combine with name
std::iter::once((info.name.clone(), info.location.0))
.chain(std::iter::once((info.name.clone(), info.location.1)))
})
.flatten() // unwrap inner iteration
.map(|(name, pos)| world_msg::SiteInfo {
name: Some(name),
kind: world_msg::SiteKind::Cave,
wpos: info.location.0,
}),
)
.chain(
self.civs()
.caves
.iter()
.map(|(_, info)| world_msg::SiteInfo {
name: Some(info.name.clone()),
kind: world_msg::SiteKind::Cave,
wpos: info.location.1,
wpos: pos,
}),
)
.collect(),