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How can I obtain the element-wise logical NOT of a pandas Series?
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Wierd, I actually tested the tilde as it was mentioned in the documentation, but it didn't perform the same as np.invert :S
– root
Apr 14 '13 at 13:11
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'typeid' versus 'typeof' in C++
...icy, but as the question is tagged C++ I would expect it to refer to the latest standard. Retagging the question as C++03 would also be an option imho. I personally get quite confused sometimes, as I have to use preC++11 at work and sometimes I am not sure what is true "pre11" or "post11".
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Django's SuspiciousOperation Invalid HTTP_HOST header
...ases where you simply cannot avoid using an if, for example if you need to test a variable which has no equivalent directive." My example uses it correctly and works well in my production environment. So in conclusion, DO do it like this! :)
– Brent O'Connor
O...
Using 'starts with' selector on individual class names
...call :acp() for "A Class Prefix." Code is at the bottom of this post.
var test = $('div:acp("starting_text")');
This will select any and all <div> elements that have at least one class name beginning with the given string ("starting_text" in this example), regardless of whether that class i...
postgresql return 0 if returned value is null
...he second is if there are NULL values in the query.
For all versions I've tested, postgres and mysql will ignore all NULL values when averaging, and it will return NULL if there is nothing to average over. This generally makes sense, as NULL is to be considered "unknown". If you want to override t...
Using multiple let-as within a if-statement in Swift
...two values from a dictionary and before using them I have to cast them and test for the right type. This is what I came up with:
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Difference between Destroy and Delete
...ased on the :dependent option passed into the association. However, during testing, I found the following side effect where callbacks were only ran for delete and not delete_all
dependent: :destroy Example:
class Parent < ApplicationRecord
has_many :children,
before_remove: -> (_) {...
How do I find the most recent git commit that modified a file?
... relative path names with wildcards, for ex:
git rev-list origin/user/bob/testbranch -1 src/bfiles/*.txt
...Which would tell you what the most recent change was to the wildcard match in that branch's history. The options for rev-list are extreme, it is one of the most important plumbing commands,...
Submitting HTML form using Jquery AJAX
... $.post documentation.
Example: Send form data using ajax requests
$.post("test.php", $("#testform").serialize());
Example: Post a form using ajax and put results in a div
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.9.1.js"></scr...
When should I use GC.SuppressFinalize()?
...d a finalizer to debug builds of their own IDisposable classes in order to test that code has disposed their IDisposable object properly.
public void Dispose() // Implement IDisposable
{
Dispose(true);
#if DEBUG
GC.SuppressFinalize(this);
#endif
}
#if DEBUG
~MyClass() // the finalizer
{
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