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fix undoing last learning card corner case

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This commit is contained in:
Damien Elmes 2021-08-04 10:29:01 +10:00
parent fc931c3edb
commit 746b19e38c
1 changed files with 4 additions and 1 deletions
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5
rslib/src/scheduler/queue/learning.rs
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@ -164,7 +164,10 @@ impl CardQueues {
.current_learning_cutoff
.adding_secs(self.learn_ahead_secs)
{
self.counts.learning -= 1;
// The saturating_sub() deals with a corner case: one remaining
// learning card, delayed so it doesn't appear twice. Will be
// within the current cutoff but not included in the count.
self.counts.learning = self.counts.learning.saturating_sub(1);
}
Some(entry)
} else {