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How to do relative imports in Python?
...he module is actually located on the file system.
In Python 2.6, they're adding the ability to reference modules relative to the main module. PEP 366 describes the change.
Update: According to Nick Coghlan, the recommended alternative is to run the module inside the package using the -m switch.
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How to scale threads according to CPU cores?
I want to solve a mathematical problem with multiple threads in Java. my math problem can be separated into work units, that I want to have solved in several threads.
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You can't specify target table for update in FROM clause
...should only be selecting the columns you need in that innermost query, and adding a good WHERE clause to limit the results, too.
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Forking from GitHub to Bitbucket
...pository, in order to be able to get the updates without the need to download all the CakePHP zip/tar and replace the folder, then commit and push, but maybe with a ‘merge’(?).
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JMS and AMQP - RabbitMQ
...d on the Java Enterprise Edition (Java EE) to create, send, receive, and read messages. It allows the communication between different components of a distributed application to be loosely coupled, reliable, and asynchronous.
Now (from Wikipedia):
The Advanced Message Queuing Protocol (AMQP) is ...
How to stop /#/ in browser with react-router?
Any way to prevent /#/ from showing in the browser's address bar when using react-router? That's with ReactJS. i.e. Clicking on links to go to a new route shows localhost:3000/#/ or
localhost:3000/#/about . Depending on the route.
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Reloading the page gives wrong GET request with AngularJS HTML5 mode
...he browser has no way of knowing that this isn't a real URL, so it goes ahead and loads it. However if you have loaded up the root page first, and all the javascript code, then when you navigate to /about Angular can get in there before the browser tries to hit the server and handle it accordingly
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Calculate distance between 2 GPS coordinates
...t of 60 so S31 30' is -31.50 degrees.
Don't forget to convert degrees to radians. Many languages have this function. Or its a simple calculation: radians = degrees * PI / 180.
function degreesToRadians(degrees) {
return degrees * Math.PI / 180;
}
function distanceInKmBetweenEarthCoordinates(l...
Get to UIViewController from UIView?
...ould not need to access the view controller directly.
The view should instead be independent of the view controller, and be able to work in different contexts.
Should you need the view to interface in a way with the view controller, the recommended way, and what Apple does across Cocoa is to use the...
How do you query for “is not null” in Mongo?
...ding to the docs, $exists currently can't use an index, but $ne can.
Edit: Adding some examples due to interest in this answer
Given these inserts:
db.test.insert({"num":1, "check":"check value"});
db.test.insert({"num":2, "check":null});
db.test.insert({"num":3});
This will return all three docume...