Update src/optimal_retention.rs

Co-authored-by: Luc Mcgrady <[email protected]>
open-spaced-repetition · Dec 25, 2024 · d339eb1 · d339eb1
1 parent 661d74d
commit d339eb1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/optimal_retention.rs b/src/optimal_retention.rs
@@ -228,7 +228,7 @@ pub fn simulate(
         // Guards
         if card.due >= learn_span as f32 {
             if !is_learn {
-                let delta_t = learn_span - last_date_index;
+                let delta_t = learn_span.max(last_date_index) - last_date_index;
                 let pre_sim_days = (-card.last_date) as usize;
                 for i in 0..delta_t {
                     memorized_cnt_per_day[last_date_index + i] +=