diff options
Diffstat (limited to 'altoslib/AltosTimeSeries.java')
| -rw-r--r-- | altoslib/AltosTimeSeries.java | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/altoslib/AltosTimeSeries.java b/altoslib/AltosTimeSeries.java index b3c432fc..9f3b4d80 100644 --- a/altoslib/AltosTimeSeries.java +++ b/altoslib/AltosTimeSeries.java @@ -151,11 +151,15 @@ public class AltosTimeSeries implements Iterable<AltosTimeValue>, Comparable<Alt } public AltosTimeValue first() { - return values.get(0); + if (values.size() > 0) + return values.get(0); + return null; } public AltosTimeValue last() { - return values.get(values.size() - 1); + if (values.size() > 0) + return values.get(values.size() - 1); + return null; } public double average() { |