From: janosch84@... Date: 2017-04-30T19:23:39+00:00 Subject: [ruby-core:80943] [Ruby trunk Feature#10095] Object#as Issue #10095 has been updated by janosch-x (Janosch M��ller). The weakness of "as" is that it is not a verb. This puts it at odds with the majority of core methods and makes it confusing when followed up by more method calls. Without a follow-up it is indeed quite readable: `number.as { |x| x ** 2 }` Treat the number as it's square. Fair enough! With more stuff chained, though, it becomes confusing, because a sentence like "Treat A as B" has a certain finality to it. In a natural language you would not say something like "Treat A as B as C". Thus a longer chain becomes hard to read: `number.as { |x| x ** 2 }.next.as { |x| x ** 2 } # => 10201` Using a verb instead makes it much easier to visualize the flow of events: `number.convert { |x| x ** 2 }.next.convert { |x| x ** 2 }` ---------------------------------------- Feature #10095: Object#as https://bugs.ruby-lang.org/issues/10095#change-64601 * Author: matsuda (Akira Matsuda) * Status: Open * Priority: Normal * Assignee: * Target version: ---------------------------------------- We've had so many times of feature requests for a method similar to Object#tap that doesn't return self but returns the given block's execution result (e.g. #7388, #6684, #6721 ). I'm talking about something like this in Ruby of course: Object.class_eval { def as() yield(self) end } IIRC Matz is not against introducing this feature but he didn't like any of the names proposed in the past, such as embed, do, identity, ergo, reference, yield_self, itself, apply, map, tap!, etc. So, let us propose a new name, Object#as today. It's named from the aspect of the feature that it gives the receiver a new name "as" a block local variable. For instance, the code reads so natural and intuitive like this: (1 + 2 + 3 + 4).as {|x| x ** 2} => 100 Array.new.as {|a| a << 1; a << 2} => [1, 2] ---Files-------------------------------- itself-block.patch (1.35 KB) -- https://bugs.ruby-lang.org/ Unsubscribe: