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How to find the kth largest element in an unsorted array of length n in O(n)?
I believe there's a way to find the kth largest element in an unsorted array of length n in O(n). Or perhaps it's "expected" O(n) or something. How can we do this?
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The application may be doing too much work on its main thread
...ning different kinds of sample codes the emulator using 3 different free libraries, nothing is showing in the layout screen. The logcat is repeating the following message:
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Iteration over std::vector: unsigned vs signed index variable
What is the correct way of iterating over a vector in C++?
17 Answers
17
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postgresql - replace all instances of a string within text field
In postgresql, how do I replace all instances of a string within a database column?
4 Answers
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Naming convention - underscore in C++ and C# variables
It's common to see a _var variable name in a class field. What does the underscore mean? Is there a reference for all these special naming conventions?
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Have nginx access_log and error_log log to STDOUT and STDERR of master process
Is there a way to have the master process log to STDOUT STDERR instead of to a file?
6 Answers
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What is a regular expression which will match a valid domain name without a subdomain?
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Well, it's pretty straightforward a little sneakier than it looks (see comments), given your specific requirements:
/^[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9]\.[a-zA-Z]{2,}$/
But note this will reject a lot of valid domains.
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How can I rename a database column in a Ruby on Rails migration?
I wrongly named a column hased_password instead of hashed_password .
26 Answers
26
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Responding with a JSON object in Node.js (converting object/array to JSON string)
I'm a newb to back-end code and I'm trying to create a function that will respond to me a JSON string. I currently have this from an example
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Is there a way to make npm install (the command) to work behind proxy?
Read about a proxy variable in a .npmrc file but it does not work. Trying to avoid manually downloading all require packages and installing.
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