From: nobu@... Date: 2017-05-01T07:50:45+00:00 Subject: [ruby-core:80949] [Ruby trunk Feature#10095] Object#as Issue #10095 has been updated by nobu (Nobuyoshi Nakada). Description updated I think that `#convert` suggests something is changed by the method itself. ( I like `#let`) Anyway, since Matz has accepted `#yield_self` months ago already[1], now introduce it. [1]: https://bugs.ruby-lang.org/issues/12760#change-61691 ---------------------------------------- Feature #10095: Object#as https://bugs.ruby-lang.org/issues/10095#change-64610 * 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: ```ruby 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: ```ruby (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: