From: Robert Klemme <shortcutter@...>
Date: 2013-04-23T23:52:43+09:00
Subject: Re: Tap method : good or bad practice ?

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On Tue, Apr 23, 2013 at 12:05 PM, Michel Demazure <lists@ruby-forum.com>wrote:

> tamouse mailing lists wrote in post #1106508:
>
> > The thing I don't like about using .tap in the way sown is that it feels
> > like a side effect, but admittedly that comes from my initial belief
> > about
> > the intention of .tap. As with most things, we find new uses for things
> > that weren't originally thought of, and I find that good for the most
> > part.
>
> I often find myself using idioms like
>
> Klass.new.tap do
> ...
> end
>

That doesn't make any sense at all: there is no point in using #tap if you
do not assign the result and not use the block parameter.  (Note: #tap does
not change self.)  Or do you mean

Klass.new.instance_eval do
...
end


> with Klass = Hash, Array, ... , and dreaming about a shortcut to
> 'new.tap' like 'such_that', 'with', ...
>

What is it that you want to achieve?  Can you please come up with a more
realistic example?

Kind regards

robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Tue, Apr 23, 2013 at 12:05 PM, Michel Demazure <span dir=3D"ltr"=
>&lt;<a href=3D"mailto:lists@ruby-forum.com" target=3D"_blank">lists@ruby-f=
orum.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">tamouse mailing lists wrote in post #1106508=
:<br>
<div class=3D"im"><br>
&gt; The thing I don&#39;t like about using .tap in the way sown is that it=
 feels<br>
&gt; like a side effect, but admittedly that comes from my initial belief<b=
r>
&gt; about<br>
&gt; the intention of .tap. As with most things, we find new uses for thing=
s<br>
&gt; that weren&#39;t originally thought of, and I find that good for the m=
ost<br>
&gt; part.<br>
<br>
</div>I often find myself using idioms like<br>
<br>
Klass.new.tap do<br>
...<br>
end<br></blockquote><div><br></div><div style>That doesn&#39;t make any sen=
se at all: there is no point in using #tap if you do not assign the result =
and not use the block parameter. =A0(Note: #tap does not change self.) =A0O=
r do you mean</div>
<div style><br></div><div style>Klass.new.instance_eval do</div><div style>=
...</div><div style>end</div><div style>=A0</div><blockquote class=3D"gmail=
_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:=
1ex">
with Klass =3D Hash, Array, ... , and dreaming about a shortcut to<br>
&#39;new.tap&#39; like &#39;such_that&#39;, &#39;with&#39;, ...<br></blockq=
uote><div><br></div><div style>What is it that you want to achieve? =A0Can =
you please come up with a more realistic example?</div></div><br>Kind regar=
ds</div>
<div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">robert<br c=
lear=3D"all"><div><br></div>-- <br>remember.guy do |as, often| as.you_can -=
 without end<br><a href=3D"http://blog.rubybestpractices.com/">http://blog.=
rubybestpractices.com/</a>
</div></div>

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