I was just going to post about this. Currently it is not possible to call the extension methods in System::Linq::Enumerable and System::Linq::Queryable.<br><br>>>> require 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'<br>
=> true<br>>>> include System::Linq<br>=> Object<br>>>> Queryable<br>=> System::Linq::Queryable<br>>>> Queryable.where<br>:0:in `CallSite.Target': wrong number of arguments (1 for 2147483647) (ArgumentError)<br>
...<br><br><div class="gmail_quote">2009/4/7 Tomas Matousek <span dir="ltr"><<a href="mailto:Tomas.Matousek@microsoft.com">Tomas.Matousek@microsoft.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Method of Queryable take expression trees. Ruby lambdas are not
convertible to expression trees.</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">You need to build the expression tree yourself.</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);">Tomas</span></p>
<p><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
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<p><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;">
<a href="mailto:ironruby-core-bounces@rubyforge.org" target="_blank">ironruby-core-bounces@rubyforge.org</a>
[mailto:<a href="mailto:ironruby-core-bounces@rubyforge.org" target="_blank">ironruby-core-bounces@rubyforge.org</a>] <b>On Behalf Of </b>Ivan Porto
Carrero<br>
<b>Sent:</b> Tuesday, April 07, 2009 11:06 AM<br>
<b>To:</b> ironruby-core<br>
<b>Subject:</b> [Ironruby-core] Linq syntax?</span></p>
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<p> </p>
<p>Hi</p>
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<p> </p>
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<p>What would be the syntax to call Linq methods?</p>
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<p> </p>
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<p>for example: </p>
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<p>I have an IQueryable<Users> and I want to get the
equivalent out of</p>
</div>
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<p> </p>
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<div>
<p>from user in MyRepository.Users</p>
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<p>where <a href="http://user.name" target="_blank">user.name</a> ==
"somename"</p>
</div>
<div>
<p> </p>
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<p>That of course is only one example, I want to do a lot more
:)</p>
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<p> </p>
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<div>
<p>My best guess is that I would have to do something like this
only it doesn't work</p>
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<p> </p>
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<div>
<p>System::Linq::Queryable.where(MyRepository.Users, lambda {
|user| <a href="http://user.name" target="_blank">user.name</a> == "somename" })</p>
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<p> </p>
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<p>yields wrong number of arguments (2 for 2147483647)</p>
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<p> </p>
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<p>So what is the correct way?</p>
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<p style="margin-bottom: 12pt;">---<br>
Met vriendelijke groeten - Best regards - Salutations<br>
Ivan Porto Carrero<br>
Blog: <a href="http://flanders.co.nz" target="_blank">http://flanders.co.nz</a><br>
Twitter: <a href="http://twitter.com/casualjim" target="_blank">http://twitter.com/casualjim</a><br>
Author of IronRuby in Action (<a href="http://manning.com/carrero" target="_blank">http://manning.com/carrero</a>)</p>
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<br></blockquote></div><br>