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What is the difference between t.belongs_to and t.references in rails?

What is the difference between t.references and t.belongs_to ? Why are we having those two different words? It seems to me they do the same thing? Tried some Google search, but find no explanation. ...
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Enum type constraints in C# [duplicate]

What is the reason behind C# not allowing type constraints on Enum 's? I'm sure there is a method behind the madness, but I'd like to understand why it's not possible. ...
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is vs typeof

Which of these pieces of code is faster? 4 Answers 4 ...
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Java: How to Indent XML Generated by Transformer

I'm using Java's built in XML transformer to take a DOM document and print out the resulting XML. The problem is that it isn't indenting the text at all despite having set the parameter "indent" explicitly. ...
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Check if property has attribute

Given a property in a class, with attributes - what is the fastest way to determine if it contains a given attribute? For example: ...
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How to get UITableView from UITableViewCell?

I have a UITableViewCell which is linked to an object and I need to tell if the cell is visible. From the research I've done, this means I need to somehow access the UITableView that contains it (from there, there are several ways to check if it's visible). So I'm wondering if UITableViewCell ...
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Why there is no ForEach extension method on IEnumerable?

Inspired by another question asking about the missing Zip function: 20 Answers 20 ...
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How can I get every nth item from a List?

I'm using .NET 3.5 and would like to be able to obtain every * n *th item from a List. I'm not bothered as to whether it's achieved using a lambda expression or LINQ. ...
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What does “coalgebra” mean in the context of programming?

I have heard the term "coalgebras" several times in functional programming and PLT circles, especially when the discussion is about objects, comonads, lenses, and such. Googling this term gives pages that give mathematical description of these structures which is pretty much incomprehensible to me. ...
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Google Gson - deserialize list object? (generic type)

I want to transfer a list object via Google Gson, but I don't know how to deserialize generic types. 13 Answers ...