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Creating a new column based on if-elif-else condition
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To formalize some of the approaches laid out above:
Create a function that operates on the rows of your dataframe like so:
def f(row):
if row['A'] == row['B']:
val = 0
elif row['A'] > row['B']:
val = ...
Rails migrations: self.up and self.down versus change
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For many operations rails can guess what is the inverse operation (without problems). For example, in your case what is the reverse operation of add_column to call when you rollback? Of course it's remove_column. What is the i...
Nginx not picking up site in sites-enabled?
After over 10 hours of research I have not figured out why this doesn't work! I am trying to move my localhost to my sites-enabled folder which is in /etc/nginx/sites-enabled/default.
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Is it possible for intellij to organize imports the same way as in Eclipse?
I'm working on a project where all the team members are using Eclipse and I'm the only IDEA user. This creates a lot of noise from imports rearrangements. The order in which eclipse imports is: Java, Javax, Org, Com, everything else in alphabetical order. Is it possible to configure IDEA to follow t...
Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug
... tested and verified that the solution given in the accepted answer below works on that sample project. If this solution doesn't work for you, you are probably having a different issue (which belongs in a separate question).
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What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
...eter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into require.
The permit method returns a copy of the parameters object, returning only the permitted keys and values. When creating a new ActiveR...
Remove Fragment Page from ViewPager in Android
...m trying to dynamically add and remove Fragments from a ViewPager, adding works without any problems, but removing doesn't work as expected.
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How do you create a remote Git branch?
...lly created when you push it to the remote server. So when you feel ready for it, you can just do:
git push <remote-name> <branch-name>
Where <remote-name> is typically origin, the name which git gives to the remote you cloned from. Your colleagues would then just pull that bra...
Problem getting the AssemblyVersion into a web page using Razor /MVC3
...GetType(YourApplicationNamespace.MvcApplication).Assembly.GetName.Version for all the VB.NETers. Both of us.
– edhubbell
Dec 10 '12 at 15:20
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Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
Why do Scala and frameworks like Spark and Scalding have both reduce and foldLeft ? So then what's the difference between reduce and fold ?
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