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drain_filter #3

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blobject opened this issue Feb 15, 2021 · 0 comments
Open

drain_filter #3

blobject opened this issue Feb 15, 2021 · 0 comments

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@blobject
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use BTreeMap.drain_filter for selective db update, rather than clearing everything and replenishing.

ref: rust-lang / rust / 70530
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@blobject