--- alexandria-book-collection-manager-0.7.4/lib/alexandria/preferences.rb.negative 2019-10-25 01:20:07.000000000 +0900
+++ alexandria-book-collection-manager-0.7.4/lib/alexandria/preferences.rb 2020-01-04 14:09:13.773911633 +0900
@@ -239,7 +239,7 @@ module Alexandria
true
elsif value == "false" # bool
false
- elsif /^[0-9]+$/.match?(value) # int
+ elsif /^-?[0-9]+$/.match?(value) # int
value.to_i
elsif value =~ /^\[(.*)\]$/ # list (assume of type String)
Regexp.last_match[1].split(",")