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How to semantically add heading to a list

This has been bothering me for a while, and I'm wondering if there's any consensus on how to do this properly. When I'm using an HTML list, how do I semantically include a header for the list? ...
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How do I show/hide a UIBarButtonItem?

I created a toolbar in IB with several buttons. I would like to be able to hide/show one of the buttons depending on the state of the data in the main window. ...
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Find the division remainder of a number

How could I go about finding the division remainder of a number in Python? 12 Answers ...
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Get data from fs.readFile

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Best way to iterate through a Perl array

Which is the best implementation(in terms of speed and memory usage) for iterating through a Perl array? Is there any better way? ( @Array need not be retained). ...
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How can I find the number of days between two Date objects in Ruby?

How can I find the number of days between two Date objects? 10 Answers 10 ...
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Duplicate log output when using Python logging module

I am using python logger. The following is my code: 14 Answers 14 ...
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Setting an environment variable before a command in Bash is not working for the second command in a

In a given shell, normally I'd set a variable or variables and then run a command. Recently I learned about the concept of prepending a variable definition to a command: ...
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multi-layer perceptron (MLP) architecture: criteria for choosing number of hidden layers and size of

If we have 10 eigenvectors then we can have 10 neural nodes in input layer.If we have 5 output classes then we can have 5 nodes in output layer.But what is the criteria for choosing number of hidden layer in a MLP and how many neural nodes in 1 hidden layer? ...
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What's a good rate limiting algorithm?

I could use some pseudo-code, or better, Python. I am trying to implement a rate-limiting queue for a Python IRC bot, and it partially works, but if someone triggers less messages than the limit (e.g., rate limit is 5 messages per 8 seconds, and the person triggers only 4), and the next trigger is ...