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<div dir="ltr"><font face="Tahoma" size="2"><b>From:</b> ironruby-core-bounces@rubyforge.org [ironruby-core-bounces@rubyforge.org] On Behalf Of Peter Bacon Darwin [bacondarwin@googlemail.com]<br>
<b>Sent:</b> Tuesday, 5 February 2008 6:37 PM<br>
<b>To:</b> ironruby-core@rubyforge.org<br>
<b>Subject:</b> Re: [Ironruby-core] ConvertTo vs Cast<br>
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<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Regarding the aside, you can pass Float, Bignum, Complex or any other class you choose to define to the Fixnum#+ operator so you do need an overload with
object. I seem to remember it then coerces the fixnum to whatever the other type is and then calls + on the coerced object.</span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="calibri" size="2"></font></span> </p>
<span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="calibri" size="2">
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="Times New Roman" color="#000000" size="3">In Ruby 1.8.6:</font></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font color="#000000"></font></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="Times New Roman" color="#000000" size="3">Fixnum.instance_method("+').bind(3.0)</font></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font color="#000000"></font></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="Times New Roman" color="#000000" size="3">produces:</font></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font color="#000000"></font></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="Times New Roman" color="#000000" size="3">'bind': bind argument must be an instance of Fixnum (TypeError)</font></span></p>
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<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'">Without looking at the code I can’t comment on the main thrust of the mail, but shouldn’t the local variable i be a Fixnum from the word go and therefore
call the LessThan(int, int) method anyway?</span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="calibri" size="2"></font></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="Times New Roman" color="#000000" size="3">Yes, LessThan(int, int) is called each time, but an unnecessary call is also made to method ConvertToInt32
every time around the loop to convert what is already an integer into an integer.</font></span></p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"></span><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"></span> </p>
<p class="MsoNormal"><span style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Calibri','sans-serif'"><font face="Times New Roman" color="#000000" size="3">Cheers, Wayne.</font></span></p>
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