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Published on 2010-03-23T23:58:48Z
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2010/03/24
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I am new to Ruby, is there a way to yield values from Ruby functions? If yes, how? If not, what are my options to write lazy code?
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Ok I followed the steps for setting up ruby and rails on my Vista machine and I am having a problem connecting to the database.
Contents of database.yml
development:
adapter: sqlserver
database: APPS_SETUP
Host: WindowsVT06\SQLEXPRESS
Username: se
Password: paswd
Run rake db:migrate…
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My application requires to keep large data objects in session. There are like 3-4 data objects each created by parsing a csv containing 150 X 20 cells having strings of 3-4 characters.
My application shows this error- "marshal data too short".
I tried this-
Deleting the old session table.
Deleting…
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I don't know is it my mistake or no. So i have that code:
<code>
post '/singin/get_token' do
content_type :xml
puts request.body.read
puts xmlRequest
xmlRequest = REXML::Document.new(request.body.read)
...
</code>
And when i post something like that:
<code>
<?xml…
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reading around the various ruby install tutorials it's required to change path from /usr/bin/ruby to /usr/local/bin/ruby but i cant seem to be able to do it. Ultimately i want to install Ruby 1.9.2, should i uninstall 1.8.7 or what? i tried to install Ruby 1.9.2 with macports, the installation seemed…
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i am getting a strange bundler error when running
bundle pack
with bundler 0.9.12
any ideas? (see pastie for a better formatted code: http://pastie.org/881328 )
/opt/ruby-enterprise-1.8.7-2010.01/lib/ruby/site_ruby/1.8/rubygems/package/tar_input.rb:49:in `initialize': not in gzip format (Zlib::GzipFile::Error)
…
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So, this question was just asked on SO:
http://stackoverflow.com/questions/2740001/how-to-handle-an-infinite-ienumerable
My sample code:
public static void Main(string[] args)
{
foreach (var item in Numbers().Take(10))
Console.WriteLine(item);
Console.ReadKey();
}
public static…
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What is wrong is the following method?
def someMethod(funcs: = Option[String]*) = {
...
}
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Delay execution is almost always a boon. But then there are cases when it’s a problem and you resort to “fetch” (in Nhibernate) to eager fetch it.
Do you know practical situations when lazy evaluation can bite you back…?
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Can anyone out there name a few books that address the topic of program execution models??
I want a book that can answer questions such as...
What is the difference between interpreted and compiled languages and what are the performance consequences at runtime??
What is the difference between lazy…
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First of all – shout out to Peter Adams – from the feedback I have gotten from him on the last few posts of F# that I have done – my mind has just been expanded. I did a blog post a few days ago about infinite sequences – I didn’t really understand what was going on with it, and I still don’t really…
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