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Is there any difference between “foo is None” and “foo == None”?
...ment foo is none, Python simply compares the memory address of objects. It means you are asking the question "Do I have two names for the same object?"
== on the other hand tests for equality as determined by the __eq__() method. It doesn't cares about identity.
In [102]: x, y, z = 2, 2, 2.0
In [...
LEFT JOIN only first row
...track. Thanks again for all the answers, which helped a lot of guys in the mean time. Got it working like this:
SELECT *
FROM feeds f
LEFT JOIN artists a ON a.artist_id = (
SELECT artist_id
FROM feeds_artists fa
WHERE fa.feed_id = f.id
LIMIT 1
)
WHERE f.id = '13815'
...
Setting dynamic scope variables in AngularJs - scope.
... new answer to the question!
Here is the example:
var the_string = 'life.meaning';
// Get the model
var model = $parse(the_string);
// Assigns a value to it
model.assign($scope, 42);
// Apply it to the scope
// $scope.$apply(); <- According to comments, this is no longer needed
console.log(...
Django filter versus get for single object?
...hat's why QS.get() is good. 2. Details matter: does "expecting only one" means always 0-1 objects, or it's possible to have 2+ objects and that case should be handled too (in this case len(objs) is a terrible idea)? 3. Don't assume anything about overhead without a benchmark (I think that in this ...
Search text in stored procedure in SQL Server
... You might have tried it in new query and it should have worked for you. I mean no need to restart the SSMS. Thanks for providing Shortcuts path for SSMS 18.2.
– pedram
May 12 at 4:24
...
What is the javascript MIME type for the type attribute of a script tag? [duplicate]
...
Browsers won't do anything ... but the mime type can mean a lot to a proxy server or a CDN (like Akamai), these might do some last mile compression of known mime types for you. If headers are clean and standard, such things are easier.
– Precipitous
...
How to get the unique ID of an object which overrides hashCode()?
...ed by the JavaTM programming language.
If a class overrides hashCode, it means that it wants to generate a specific id, which will (one can hope) have the right behaviour.
You can use System.identityHashCode to get that id for any class.
...
Isn't “package private” member access synonymous with the default (no-modifier) access?
...e one where none of them are explicitly given) is "package-private", which means only things in the same package can access them. However, being in the same package implies nothing about the inheritance relationship between classes -- it's purely a naming convention.
"Protected" means that not only...
SQL Update with row_number()
...olumn isn't nullable.
When I say the performance increase was massive I mean it was essentially instantaneous when updating a small number of rows. With the right indexes I was able to achieve an update that took the same amount of time as the 'inner' query does by itself:
SELECT PaidOrderIn...
What can , and be used for?
...
@BalusC What exactly you mean by "You should however take the possible implications of a new GET request into account for a request and view scoped bean."
– Geek
Nov 6 '12 at 10:57
...