prevent empty list to fail in sumOf

holgerbrandl · Jul 2, 2024 · 9484ca3 · 9484ca3
1 parent 26f72b4
commit 9484ca3
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/main/kotlin/org/kalasim/misc/TimeUtil.kt b/src/main/kotlin/org/kalasim/misc/TimeUtil.kt
@@ -11,7 +11,11 @@ fun Iterable<Duration>.sum(): Duration = sumOf { it }
 
 /** Compute the sum of a set of durations via a selector function.*/
 fun <T> Iterable<T>.sumOf(selector: (T) -> Duration) = map { selector(it) }.run {
- reduce { a, b -> a + b }
+ if(isEmpty()) {
+ Duration.ZERO
+ } else {
+ reduce { a, b -> a + b }
+ }
 }