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-rw-r--r--lib/dataset.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/dataset.rb b/lib/dataset.rb
index 44690e1..6e7d67f 100644
--- a/lib/dataset.rb
+++ b/lib/dataset.rb
@@ -46,7 +46,7 @@ module OpenTox
if data_entries[substance.to_s] and data_entries[substance.to_s][feature.to_s]
data_entries[substance.to_s][feature.to_s]
else
- nil
+ [nil]
end
end