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How to determine if a number is a prime with regex?
I found the following code example for Java on RosettaCode :
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Check if class already assigned before adding
In jQuery, is it recommended to check if a class is already assigned to an element before adding that class? Will it even have any effect at all?
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JRuby on Rails vs. Ruby on Rails, what's difference?
...d JRuby on Rails. I'm having trouble finding information on what's difference between JRuby on Rails and Ruby on Rails.
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Redis: possible to expire an element in an array or sorted set?
Is it currently only possible to expire an entire key/value pair? What if I want to add values to a List type structure and have them get auto removed 1 hour after insertion. Is that currently possible, or would it require running a cron job to do the purging manually?
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What is the purpose of the -nodes argument in openssl?
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What are the mechanics of short string optimization in libc++?
This answer gives a nice high-level overview of short string optimization (SSO). However, I would like to know in more detail how it works in practice, specifically in the libc++ implementation:
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Git remote branch deleted, but still it appears in 'branch -a'
Let's say I had a branch named coolbranch in my repository.
5 Answers
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jQuery - multiple $(document).ready …?
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Count, size, length…too many choices in Ruby?
I can't seem to find a definitive answer on this and I want to make sure I understand this to the "n'th level" :-)
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Why does this code segfault on 64-bit architecture but work fine on 32-bit?
I came across the following C puzzle:
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