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Apache Spark: map vs mapPartitions?
What's the difference between an RDD's map and mapPartitions method? And does flatMap behave like map or like mapPartitions ? Thanks.
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String.Join method that ignores empty strings?
The VB.NET method String.Join(separator, stringArray) is similar to PHP's implode, but any null elements in the array are replaced with an empty string, so thatc:
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how to restart only certain processes using supervisorctl?
I'm running a few processes using supervisord, named process1, process2, ..., process8. If I want to restart process{1-4}, how can I do that with supervisorctl?
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Func with out parameter
Can I pass a method with an out parameter as a Func?
4 Answers
4
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B-Tree vs Hash Table
In MySQL, an index type is a b-tree, and access an element in a b-tree is in logarithmic amortized time O(log(n)) .
5 Answ...
How to make git diff --ignore-space-change the default
I could probably setup an alias, but it seems like I should be able to set this as an option in the config file, only I don't see anyway to do it.
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Guid is all 0's (zeros)?
I'm testing out some WCF services that send objects with Guids back and forth. In my web app test code, I'm doing the following:
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python assert with and without parenthesis
Here are four simple invocations of assert:
5 Answers
5
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Express.js - app.listen vs server.listen
This may be a very basic question but I simply don't get it. What is the difference between creating an app using Express.js and starting the app listening on port 1234, for example:
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How to forward declare a template class in namespace std?
and used that function in my main. I get errors. Of course, I know that there are more template params for std::list (allocator I think). But, that is beside the point. Do I have to know the full template declaration of a template class to be able to forward declare it?
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