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Should I use a data.frame or a matrix?
When should one use a data.frame , and when is it better to use a matrix ?
6 Answers
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RVM: Uninstalling all gems of a gemset
I have global gems and various gemsets. I want to remove all gems of a gemset. Is there a way do to this, besides uninstalling the gemset?
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Why can't yield return appear inside a try block with a catch?
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I suspect this is a matter of practicality rather than feasibility. I suspect there are very, very few times where this restriction is actually an issue that can't be worked around - but the added complexity in the compiler woul...
My attempt at value initialization is interpreted as a function declaration, and why doesn't A a(())
Among the many things Stack Overflow has taught me is what is known as the "most vexing parse", which is classically demonstrated with a line such as
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When should I use jQuery deferred's “then” method and when should I use the “pipe” method?
jQuery's Deferred has two functions which can be used to implement asynchronous chaining of functions:
3 Answers
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Clustered vs Non-Clustered
...knowledge of SQL (Server 2008) is limited, and is now being challanged by our DBAs. Let me explain (I have mentioned obvious statements in the hope that I am right, but if you see something wrong, please tell me) the scenario:
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Difference between Repository and Service Layer?
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Repository Layer gives you additional level of abstraction over data access. Instead of writing
var context = new DatabaseContext();
return CreateObjectQuery<Type>().Where(t => t.ID == param).First();
to get a single item from database, y...
How to implement has_many :through relationships with Mongoid and mongodb?
Using this modified example from the Rails guides , how does one model a relational "has_many :through" association using mongoid?
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How to create a custom attribute in C#
I have tried lots of times but still I am not able to understand the usage of custom attributes (I have already gone through lots of links).
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Differences between ExpandoObject, DynamicObject and dynamic
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The dynamic keyword is used to declare variables that should be late-bound.
If you want to use late binding, for any real or imagined type, you use the dynamic keyword and the compiler does the rest.
When you use the dynamic keyword to interact wi...