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Split comma-separated strings in a column into separate rows
I have a data frame, like so:
6 Answers
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Return from lambda forEach() in java
I am trying to change some for-each loops to lambda forEach() -methods to discover the possibilities of lambda expressions. The following seems to be possible:
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A regex to match a substring that isn't followed by a certain other substring
...$/
Tests:
blahfooblah # pass
blahfooblahbarfail # fail
somethingfoo # pass
shouldbarfooshouldfail # fail
barfoofail # fail
Regular expression explanation
NODE EXPLANATION
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API pagination best practices
I'd love some some help handling a strange edge case with a paginated API I'm building.
11 Answers
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'await' works, but calling task.Result hangs/deadlocks
...ock situation that I describe on my blog and in an MSDN article: the async method is attempting to schedule its continuation onto a thread that is being blocked by the call to Result.
In this case, your SynchronizationContext is the one used by NUnit to execute async void test methods. I would try ...
Create SQL script that create database and tables
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In SQL Server Management Studio you can right click on the database you want to replicate, and select "Script Database as" to have the tool create the appropriate SQL file to replicate that database on another server. You can repeat this process...
What should my Objective-C singleton look like? [closed]
My singleton accessor method is usually some variant of:
26 Answers
26
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How to get all child inputs of a div element (jQuery)
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Use it without the greater than:
$("#panel :input");
The > means only direct children of the element, if you want all children no matter the depth just use a space.
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Fast way of counting non-zero bits in positive integer
...nteger in 64-bit and 32-bit chunks, respectively. Both were at least ten times slower than bin(n).count("1") (the 32-bit version took about half again as much time).
On the other hand, gmpy popcount() took about 1/20th of the time of bin(n).count("1"). So if you can install gmpy, use that.
To answ...
Array versus List: When to use which?
... that you would want to use an array. Definitely use a List<T> any time you want to add/remove data, since resizing arrays is expensive. If you know the data is fixed length, and you want to micro-optimise for some very specific reason (after benchmarking), then an array may be useful.
List&l...