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For example, why are the date helpers written like this:
time_ago_in_words(@from_time) Instead of like this:
@from_time.time_ago_in_words Is this a clear design error / inconsistency? Or is there some reason for this?
Great question!
Most of the helpers are for selecting dates / times.
http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html
I’m guessing whoever wrote it wanted a couple of util methods and so added time_ago_in_words and distance_of_time_in_words to their helper with the selects.
As time_ago_in_words and distance_of_time_in_words are presentaton focused (i.e. you may want to localize it) the developer maybe felt that the helper isn’t a bad place for them.