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Replace None with NaN in pandas dataframe
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If you imported data from an SQL database, you can combine this with the answer below. This converts None (which isn't a string) to NaN. Then you can df['column'].replace(nan, "", inplace=True) if say you wanted None to be empty string.
– V...
How is a tag different from a branch in Git? Which should I use, here?
... that may run concurrently with other development efforts on the same code base. Changes to a branch may eventually be merged back into another branch to unify them.
Usually you'll tag a particular version so that you can recreate it, e.g., this is the version we shipped to XYZ Corp. A branch is...
Case objects vs Enumerations in Scala
...This is useful when wishing to persist enumerations (for example, to a database) or create them from data residing in files. However, I find in general that enumerations are a bit clumsy in Scala and have the feel of an awkward add-on, so I now tend to use case objects. A case object is more flexibl...
What is “overhead”?
...ally referred to as "overhead" but rather is called "footprint." Also the base memory your program consumes (without regard to any data set that it's processing) is called its "footprint" as well.
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How to link godaddy domain with AWS Elastic Beanstalk environment?
...This solution is not effective from the point of SEO. See below my answer, based on Amazon's documentation.
– Vsevolod Krasnov
Aug 23 '16 at 9:00
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adding noise to a signal in python
...ance .
When modeling this in python, you can either
1. Calculate variance based on a desired SNR and a set of existing measurements, which would work if you expect your measurements to have fairly consistent amplitude values.
2. Alternatively, you could set noise power to a known level to match som...
Does MSTest have an equivalent to NUnit's TestCase?
...tHacks
1) Install the NuGet package.
2) Inherit your test class from TestBase
public class UnitTest1 : TestBase
{ }
3) Create a Property, Field or Method, that returns IEnumerable
[TestClass]
public class UnitTest1 : TestBase
{
private IEnumerable<int> Stuff
{
get
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Select multiple records based on list of Id's with linq
...aining Id's of my UserProfile table. How can i select all UserProfiles based on the list of Id's i got in a var using LINQ ?
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How to inherit constructors?
Imagine a base class with many constructors and a virtual method
14 Answers
14
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Co-variant array conversion from x to y may cause run-time exception
... reference an array of objects (in your case, LinkLabels) as an array of a base type (in this case, as an array of Controls). It is also compile time legal to assign another object that is a Control to the array. The problem is that the array is not actually an array of Controls. At runtime, it is s...