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Get time difference between two dates in seconds
... the comments unless you're using typescript.
The explanation
You need to call the getTime() method for the Date objects, and then simply subtract them and divide by 1000 (since it's originally in milliseconds). As an extra, when you're calling the getDate() method, you're in fact getting the day o...
TypeError: ObjectId('') is not JSON serializable
...ing json_util.dumps(), convert back to dict using json.loads() and finally call Flask's jsonify on it.
Example (derived from previous question's answer):
from bson import json_util, ObjectId
import json
#Lets create some dummy document to prove it will work
page = {'foo': ObjectId(), 'bar': [Obj...
Does Qt support virtual pure slots?
...just like regular c++ pure virtual methods. The code generated by MOC does call the pure virtual slots, but that's ok since the base class can't be instantiated anyway...
Again, just like regular c++ pure virtual methods, the class cannot be instantiated until the methods are given an implementatio...
Difference between matches() and find() in Java Regex
...s() is not simply a find() with implied surrounding ^ and $. Be aware that calling .find() more than once may have different results if not preceeded by reset(), while matches() will always return same result. See my answer below.
– L. Holanda
Nov 20 '15 at 22:...
Why do access tokens expire?
....
Large scale deployment don't want to perform a database lookup every API call, so instead they issue self-encoded access token which can be verified by decryption. However, this also means there is no way to revoke these tokens so they are issued for a short time and must be refreshed.
The refresh...
Will Try / Finally (without the Catch) bubble the exception?
... might be thrown in the try block of a try-finally statement higher up the call stack. That is, you can catch the exception in the method that calls the method that contains the try-finally statement, or in the method that calls that method, or in any method in the call stack. If the exception is no...
What is the difference between self::$bar and static::$bar in PHP?
... keyword. In this case, your Foo class defines a protected static property called $bar. When you use self in the Foo class to refer to the property, you're referencing the same class.
Therefore if you tried to use self::$bar elsewhere in your Foo class but you had a Bar class with a different value...
Delete/Reset all entries in Core Data?
...
You can still delete the file programmatically, using the NSFileManager:removeItemAtPath:: method.
NSPersistentStore *store = ...;
NSError *error;
NSURL *storeURL = store.URL;
NSPersistentStoreCoordinator *storeCoordinator = ...;
[storeCoordinator removePersistentS...
What does mvn install in maven exactly do
... root POM) and downloads/compiles all the needed components in a directory called .m2 under the user's folder. These dependencies will have to be resolved for the project to be built without any errors, and mvn install is one utility that could download most of the dependencies.
Further, there are ...
When does static class initialization happen?
...locks and private static methods used to instantiate private static fields called (in order) at that instant?
3 Answers
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