From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2012-02-04T02:46:34+09:00
Subject: Re: Help please Undefined Method error

2012/2/3 Peter Vandenabeele <peter@vandenabeele.com>:
> <alternative>
> def get_words
>  [].tap do |a|
>    while !(input = gets.chomp).empty?
>       a << input
>    end
>  end
> end

Aw. Do not abuse #tap, please. It's extremely unreadable, especially
to a beginner.

> * Use  [].tap{|a| a<< stuff}  so you do not have to return the
>  result array explicitly (I am not having a variable "words"
>  or "array" in the function, it is returned as the final result but
>  not stored in an explicit local variable; so I can impossibly
>  forget to return the built up array at the end, because "tap"
>  returns it automatically

There is no advantage to using constructs with tap over regular
variable I know of. IMO #tap should only be used to "inject" debugging
or other side-effects into a long method chain. (Although, if you have
a method chain so long, you probably have other problems...)

-- Matma Rex