Array#first returns nil when it's empty.
Array#first returns nil when it's empty.

Maxwell-Alexius/goby,Maxwell-Alexius/goby,goby-lang/goby,goby-lang/goby,st0012/Rooby,Maxwell-Alexius/goby,goby-lang/goby,hachi8833/goby,hachi8833/goby,st0012/Rooby,hachi8833/goby