TZInfo::Timezone.get('America/New_York').utc_to_local(nil) = -18000

[augnustin]

I would expect:

TZInfo::Timezone.get('America/New_York').utc_to_local(nil) # to equal nil

Because the time difference of nothing is nothing.

Used in code, it goes like:

TZInfo::Timezone.get('America/New_York').utc_to_local(Object.updated_at) # Object.updated_at can be nil

which consequently requires a if Object.updated_at appended, which is IMHO less elegant.

[philr]

Sorry for the delay in responding to this.

I've decided to make TZInfo raise an exception when passed a nil time (this is now implemented on the master branch). On balance, I think it is better to be explicit about handling nil values.

As for keeping the code elegant, you could add a method to the Time class in your project and then use it along with the safe navigation (&.) operator. For example:

class Time
  def to_new_york
    TZInfo::Timezone.get('America/New_York').utc_to_local(self)
  end
end

object.updated_at&.to_new_york