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<title>Re: Bug in nested iterations? (was: What is wrong wit</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear Scott,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Many thanks for your help. Indeed it makes
all the difference!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>However it seems very subtle to me; in
particular if you consider the comment for the method <span class=SpellE>from<span
class=GramE>:to:put</span></span>: <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>This is the comment:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>"Put <span class=SpellE>anObject</span>
in all indexes between <span class=SpellE>startIndex</span> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><span style='mso-tab-count:1'> </span><span
class=GramE>and</span> <span class=SpellE>endIndex</span>. <span class=GramE>Very
fast.</span> Faster than <span class=SpellE>to<span class=GramE>:do</span></span>:
for<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><span style='mso-tab-count:1'> </span><span
class=GramE>more</span> than 26 positions. Answer <span class=SpellE>anObject</span>"<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><span class=GramE><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Certainly tricky for a
beginner.</span></font></span><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Cheers<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Joaquin<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Scott Wallace
[mailto:scott.wallace@squeakland.org] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, 26 May 2005 15:12<br>
<b><span style='font-weight:bold'>To:</span></b> Joaquin Sitte<br>
<b><span style='font-weight:bold'>Cc:</span></b>
squeak-dev@lists.squeakfoundation.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Bug in nested
iterations? (was: What is wrong with this?)</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>At 2:15 PM +1000 5/26/05, Joaquin Sitte wrote:<o:p></o:p></span></font></p>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This explains the behaviour. But this does not seem to be a
terribly useful way of doing things, at least not for my purpose. What is the
proper way to define a separate vector for every element in the map?</span></font><o:p></o:p></p>
</blockquote>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi Joaquin,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>One simple way would be...<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>1 to: map size do:<o:p></o:p></span></font></p>
</div>
<div><x-tab>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </x-tab>[:i | map at: i put:
(FloatArray new: 4)]<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Cheers,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> -- Scott<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>--------<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>>> map_ Som new: 30</span></font><o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>>> map from: 1 to: map size put: (FloatArray new: 4).</span></font><o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>> This sets it up so that only one FloatArray instance is
created and</span></font><o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>>it will be pointed to by all the 30 slots of 'map' object.</span></font><o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>> (map first identityHash) = (map last identityHash)</span></font><o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>>will be true.</span></font><o:p></o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite cite>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This explains the behaviour. But this does not seem to be a
terribly useful way of doing things, at least not for my purpose. What is the
proper way to define a separate vector for every element in the map?</span></font><o:p></o:p></p>
</blockquote>
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