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Generate a random point within a circle (uniformly)

I need to generate a uniformly random point within a circle of radius R . 21 Answers ...
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What ports does RabbitMQ use?

What ports does RabbitMQ Server use or need to have open on the firewall for a cluster of nodes? 4 Answers ...
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Pandas: drop a level from a multi-level column index?

If I've got a multi-level column index: 7 Answers 7 ...
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Check substring exists in a string in C

I'm trying to check whether a string contains a substring in C like: 12 Answers 12 ...
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How to check whether a pandas DataFrame is empty?

How to check whether a pandas DataFrame is empty? In my case I want to print some message in terminal if the DataFrame is empty. ...
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What is the difference between exit(0) and exit(1) in C?

Can anyone tell me? What is the difference between exit(0) and exit(1) in C language? 11 Answers ...
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RegEx for Javascript to allow only alphanumeric

I need to find a reg ex that only allows alphanumeric. So far, everyone I try only works if the string is alphanumeric, meaning contains both a letter and a number. I just want one what would allow either and not require both. ...
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How to make button look like a link?

I need to make a button look like a link using CSS. The changes are done but when I click on it, it shows as if it's pushed as in a button. Any idea how to remove that, so that the button works as a link even when clicked? ...
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pytest: assert almost equal

How to do assert almost equal with py.test for floats without resorting to something like: 7 Answers ...
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How to remove the first Item from a list?

I have the list [0, 1, 2, 3, 4] I'd like to make it into [1, 2, 3, 4] . How do I go about this? 10 Answers ...