From: Intransition <transfire@...>
Date: 2012-05-12T23:46:13+09:00
Subject: Re: Why do you think of NilClass#to_proc?

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On Friday, May 11, 2012 4:42:52 PM UTC-4, Jan E. wrote:
>
>
> The second solution seems more intuitive to me, since it's a kind of 
> "empty proc": all parameters are discarded and the proc returns nil. 
>

That's what I thought too, but then I never came across an actual use for 
that definition.
 

> But like Bartosz already said: What's the use case for this feature? 
>

If you have a method that takes an optional block and no block is given 
then it can default to the pass-thru proc via convenient:

    def initialize(&block)
      @block = block.to_proc
    end 

But I suppose that's the crux of the issue with this: which default proc is 
the right one for a given use case?



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<br><br>On Friday, May 11, 2012 4:42:52 PM UTC-4, Jan E. wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;"><br>The second solution seems more intuitive to me, since it's a kind of 
<br>"empty proc": all parameters are discarded and the proc returns nil.
<br></blockquote><div><br>That's what I thought too, but then I never came across an actual use for that definition.<br></div><div>&nbsp;</div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">But like Bartosz already said: What's the use case for this feature?
<br></blockquote><div><br>If you have a method that takes an optional block and no block is given then it can default to the pass-thru proc via convenient:<br><br>&nbsp; &nbsp; def initialize(&amp;block)<br>&nbsp; &nbsp; &nbsp; @block = block.to_proc<br>&nbsp; &nbsp; end <br></div><br>But I suppose that's the crux of the issue with this: which default proc is the right one for a given use case?<br><br><br>
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