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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...mns to a dataframe df with n columns (n > 0).
These new columns result from the application of a function to one of the columns in the dataframe.
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The JPA hashCode() / equals() dilemma
...objects are persisted to a database. However, the problems stem
entirely from allowing objects to exist without an id before they are
saved. We can solve these problems by taking the responsibility of
assigning object IDs away from object-relational mapping frameworks
such as Hibernate. Inst...
Most Pythonic way to provide global configuration variables in config.py? [closed]
...r it to reference if you need to. You can also pass in additional defaults from your code. It also maps attribute and mapping style syntax to the same configuration object.
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Why must a nonlinear activation function be used in a backpropagation neural network? [closed]
...planatory variables
non-linear means that the output cannot be reproduced from a linear combination of the inputs (which is not the same as output that renders to a straight line--the word for this is affine).
another way to think of it: without a non-linear activation function in the network, a N...
Android: How to put an Enum in a Bundle?
...eteness sake, this is a full example of how to put in and get back an enum from a bundle.
Given the following enum:
enum EnumType{
ENUM_VALUE_1,
ENUM_VALUE_2
}
You can put the enum into a bundle:
bundle.putSerializable("enum_key", EnumType.ENUM_VALUE_1);
And get the enum back:
EnumTy...
In WPF, what are the differences between the x:Name and Name attributes?
...es not difference whether you use Name or x:Name for any type that derives from FrameworkElement (which includes most types you'd use in XAML including UserControl, a member will be generated correctly in any case). This is because FrameworkElement is decorated with [RuntimeNameProperty("Name")].
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Remove file from the repository but keep it locally
... Will this result in (files in) the directory being removed when he pulls from the remote?
– bstpierre
Aug 12 '10 at 16:24
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Changing default encoding of Python?
...code" and "can't decode" problems with Python when I run my applications from the console. But in the Eclipse PyDev IDE, the default character encoding is set to UTF-8 , and I'm fine.
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Import CSV to mysql table
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Instead of writing a script to pull in information from a CSV file, you can link MYSQL directly to it and upload the information using the following SQL syntax.
To import an Excel file into MySQL, first export it as a CSV file. Remove the CSV headers from the generated CSV f...
How to verify Facebook access token?
...using the me?access_token method is just plain wrong if the data is coming from the client side; since any site can fish for tokens then use them to authenticate into your site by accessing your api.
– srcspider
Jul 2 '15 at 11:09
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