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Add column with number of days between dates in DataFrame pandas
...s on a whole Series you need (df['A'] - df['B']) / np.timedelta64(-1, 'D') for reasons that I don't fully understand.
– dirkjot
Oct 14 '15 at 19:05
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How to change line-ending settings
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The normal way to control this is with git config
For example
git config --global core.autocrlf true
For details, scroll down in this link to Pro Git to the section named "core.autocrlf"
If you want to know what file this is saved in, you can run the command:
git conf...
python assert with and without parenthesis
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The reason is doesn't happen for assert (1==2) is parentheses around a single expression won't create a tuple automatically; you'd get the same behavior as #4 if you did assert (1==2,). The same thing would happen if you did print ('foo', 'bar') instead ...
DateTime.ToString(“MM/dd/yyyy HH:mm:ss.fff”) resulted in something like “09/14/2013 07.20.31.371”
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Is it because some culture format issue?
Yes. Your user must be in a culture where the time separator is a dot. Both ":" and "/" are interpreted in a culture-sensitive way in custom date and time formats.
How can I make sure the result string is ...
How can I save an image with PIL?
...ng using the Python image library (PIL) using a post I found earlier to perform fourier transforms of images and I can't get the save function to work. The whole code works fine but it just wont save the resulting image:
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How to merge 2 JSON objects from 2 files using jq?
...th the * operator. When given two objects, it will merge them recursively. For example,
jq -s '.[0] * .[1]' file1 file2
Important: Note the -s (--slurp) flag, which puts files in the same array.
Would get you:
{
"value1": 200,
"timestamp": 1382461861,
"value": {
"aaa": {
"value1...
How to make an ng-click event conditional?
...ed.
But other problem is that ngDisabled does not work on anything except form controls, so you can't use it with <a>, but you can use it with <button> and style it as link.
Another way is to use lazy evaluation of expressions like isDisabled || action() so action wouold not be called ...
Split list into multiple lists with fixed number of elements
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I think you're looking for grouped. It returns an iterator, but you can convert the result to a list,
scala> List(1,2,3,4,5,6,"seven").grouped(4).toList
res0: List[List[Any]] = List(List(1, 2, 3, 4), List(5, 6, seven))
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Importing from a relative path in Python
I have a folder for my client code, a folder for my server code, and a folder for code that is shared between them
5 Answer...
JPA or JDBC, how are they different?
I am learning Java EE and I downloaded the eclipse with glassfish for the same. I saw some examples and also read the Oracle docs to know all about Java EE 5. Connecting to a database was very simple. I opened a dynamic web project, created a session EJB , I used EntityManager and with the get meth...