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ActiveRecord, has_many :through, and Polymorphic Associations
...m is you're misusing the :source option. :source should points to the polymorphic belongs_to relationship. Then all you need to do is specify :source_type for the relationship you're trying to define.
This fix to the Widget model should allow you do exactly what you're looking for.
class Widget &l...
nServiceBus vs Mass Transit vs Rhino Service Bus vs other?
... using a messaging system to process files that are in a nicely decoupled work flow system.
4 Answers
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Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...ll notice that the library, from a usage perspective, has changed little. For example...
18 Answers
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How to properly check if std::function is empty in C++11?
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You're not checking for an empty lambda, but whether the std::function has a callable target stored in it. The check is well-defined and works because of std::function::operator bool which allows for implicit conversion to bool in contexts where ...
Python equivalent for PHP's implode?
Is there an equivalent for PHP's implode in Python? I've read in and split up a set of delimited words, and now I want to sort them out in random orders and print the words out with spaces in between.
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An algorithm for inflating/deflating (offsetting, buffering) polygons
...ng and offsetting library - Clipper.
While Clipper is primarily designed for polygon clipping operations, it does polygon offsetting too. The library is open source freeware written in Delphi, C++ and C#. It has a very unencumbered Boost license allowing it to be used in both freeware and commercia...
Catch Ctrl-C in C
...years ago. Yes, language standards change. If you really must better the world, please add your new answer but leave mine as is. As the answer has my name on it, I'd prefer it to contain my words too. Thank you.
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fetch in git doesn't get all branches
I have cloned a repository, after which somebody else has created a new branch, which I'd like to start working on. I read the manual, and it seems dead straight easy. Strangely it's not working, and all the posts I've found suggest I'm doing the right thing. So I'll subject myself to the lambast...
Mongo Shell - Console/Debug Log
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printjson(thing) is a little more useful when dealing with objects
– RobKohr
Oct 31 '11 at 19:08
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Remove last character of a StringBuilder?
...rAt method, but here's another alternative approach:
String prefix = "";
for (String serverId : serverIds) {
sb.append(prefix);
prefix = ",";
sb.append(serverId);
}
Alternatively, use the Joiner class from Guava :)
As of Java 8, StringJoiner is part of the standard JRE.
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