From: Robert Klemme <shortcutter@...>
Date: 2012-11-01T03:57:47+09:00
Subject: Re: bug?: local variable created in if modifier not available in modified expression

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On Wed, Oct 31, 2012 at 5:00 PM, Carlo E. Prelz <fluido@fluido.as> wrote:

>         Subject: Re: bug?: local variable created in if modifier not
> available in modified expression
>         Date: Thu 01 Nov 12 12:48:58AM +0900
>
> Quoting Robert Klemme (shortcutter@googlemail.com):
>
> > With an "if" it's never necessary.  And I do not think it makes a
> > difference performance wise.
>
> Having spent my good share of debugging time, I want to add that it
> happens to me more often than I would like to forget one of the two =
> in equality tests. I am infinitely grateful to any mechanism that
> warns me of single equals in ifs; mistaken single ='s in ifs are hard
> bugs to catch.
>
>
You mean like

$ ruby -ce 'if a = 9 then puts 1 end'
-e:1: warning: found = in conditional, should be ==
Syntax OK

?

Kind regards

robert

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<div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Wed, Oct 31, 2=
012 at 5:00 PM, Carlo E. Prelz <span dir=3D"ltr">&lt;<a href=3D"mailto:flui=
do@fluido.as" target=3D"_blank">fluido@fluido.as</a>&gt;</span> wrote:<br><=
blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">
=A0 =A0 =A0 =A0 Subject: Re: bug?: local variable created in if modifier no=
t available in modified expression<br>
=A0 =A0 =A0 =A0 Date: Thu 01 Nov 12 12:48:58AM +0900<br>
<div class=3D"im"><br>
Quoting Robert Klemme (<a href=3D"mailto:shortcutter@googlemail.com">shortc=
utter@googlemail.com</a>):<br>
<br>
&gt; With an &quot;if&quot; it&#39;s never necessary. =A0And I do not think=
 it makes a<br>
&gt; difference performance wise.<br>
<br>
</div>Having spent my good share of debugging time, I want to add that it<b=
r>
happens to me more often than I would like to forget one of the two =3D<br>
in equality tests. I am infinitely grateful to any mechanism that<br>
warns me of single equals in ifs; mistaken single =3D&#39;s in ifs are hard=
<br>
bugs to catch.<br>
<span class=3D""></span><br>
</blockquote></div><br>You mean like<br><br>$ ruby -ce &#39;if a =3D 9 then=
 puts 1 end&#39;<br>-e:1: warning: found =3D in conditional, should be =3D=
=3D<br>Syntax OK<br><br>?<br><br>Kind regards<br><br>robert<br></div>

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