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Rails: How does the respond_to block work?
I'm going through the Getting Started with Rails guide and got confused with section 6.7. After generating a scaffold I find the following auto-generated block in my controller:
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Renaming columns in pandas
I have a DataFrame using pandas and column labels that I need to edit to replace the original column labels.
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Java's Interface and Haskell's type class: differences and similarities?
While I am learning Haskell, I noticed its type class , which is supposed to be a great invention that originated from Haskell.
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Getting a map() to return a list in Python 3.x
I'm trying to map a list into hex, and then use the list elsewhere. In python 2.6, this was easy:
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What are rvalues, lvalues, xvalues, glvalues, and prvalues?
In C++03, an expression is either an rvalue or an lvalue .
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Why is there no logical xor in JavaScript?
Why is there no logical xor in JavaScript?
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How to convert a double to long without casting?
What is the best way to convert a double to a long without casting?
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Why is Hibernate Open Session in View considered a bad practice?
And what kind of alternative strategies do you use for avoiding LazyLoadExceptions?
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How to implement the activity stream in a social network
I'm developing my own social network, and I haven't found on the web examples of implementation the stream of users' actions... For example, how to filter actions for each users? How to store the action events? Which data model and object model can I use for the actions stream and for the actions it...