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How do I find duplicates across multiple columns?
...simple and efficient means to locate unwanted repetition, whilst also list all affected rows and all wanted columns:
SELECT
t.*
FROM (
SELECT
s.*
, COUNT(*) OVER (PARTITION BY s.name, s.city) AS qty
FROM stuff s
) t
WHERE t.qty > 1
ORDER BY t.name, t.city
While most...
Writing a list to a file with Python
...ist:
print >> f, item
If you're keen on a single function call, at least remove the square brackets [], so that the strings to be printed get made one at a time (a genexp rather than a listcomp) -- no reason to take up all the memory required to materialize the whole list of strings....
When should one use RxJava Observable and when simple Callback on Android?
...I decided to try out Square's Retrofit . I see that they support simple Callback
9 Answers
...
Do HttpClient and HttpClientHandler have to be disposed between requests?
... HOLD ON TO THE INSTANCE TO REUSE IT LATER"? For instance, if a method is called repeatedly and creates a new HttpClient instance (even though it's not the recommended pattern in most cases), would it still be correct to say this method should not dispose the instance (that will not be reused)? It c...
How to put a unicode character in XAML?
...
Markup files that are created in Microsoft Visual Studio are
automatically saved in the Unicode UTF-8 file format, which means that
most special characters, such as accent marks, are encoded correctly.
However, there is a set of commonly-used special characters that are
handled differentl...
SSL Connection / Connection Reset with IISExpress
...onfigured app port number was NOT in the range :44300-:44398. (I don't recall having to dismiss any warnings to get out of that range.) Changing the port number to something in this range is all I had to do to make it work.
I noticed this after reviewing the netsh http show sslcert > sslcert...
Why must a nonlinear activation function be used in a backpropagation neural network? [closed]
...ion function is to introduce non-linearity into the network
in turn, this allows you to model a response variable (aka target variable, class label, or score) that varies non-linearly with its explanatory variables
non-linear means that the output cannot be reproduced from a linear combination of ...
Check if a String contains numbers Java
...ne could do this stuff but the engineers who invented it because it's basically a secret code that only the creators know until they share it.
– JamisonMan111
Jun 21 '18 at 5:47
...
Setting background-image using jQuery CSS property
...rnatively to what the others are correctly suggesting, I find it easier usually to toggle CSS classes, instead of individual CSS settings (especially background image URLs). For example:
// in CSS
.bg1
{
background-image: url(/some/image/url/here.jpg);
}
.bg2
{
background-image: url(/anot...
Best practices for styling HTML emails [closed]
...nd do not use a <style> tag (GMail, for example, strips that tag and all it's contents).
Against your better judgement, use and abuse tables. <div>s just won't cut it (especially in Outlook).
Don't use background images, they're spotty and will annoy you.
Remember that some email client...