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When to use an interface instead of an abstract class and vice versa?
...e is more of a high level architectural tool (which becomes clearer if you start to grasp design patterns) - an Abstract has a foot in both camps and can perform some of the dirty work too.
Why use one over the other? The former allows for a more concrete definition of descendants - the latter all...
Intercept page exit event
...e for the duration of your loop * scheduled requests); the requests aren't started in parallel; you aren't guaranteed to really send your requests. If I were forced to confront with this problem, I'd go with a synchronous ajax request, if there is only one request. With multiple requests I'd use asy...
“open/close” SqlConnection or keep open?
...
Use Method (a), every time. When you start scaling your application, the logic that deals with the state will become a real pain if you do not.
Connection pooling does what it says on the tin. Just think of what happens when the application scales, and how hard...
Why does Internet Explorer not send HTTP post body on Ajax call after failure?
...ses the old proxy. However, if I kill the old
proxy ("killall squid"), it starts using the new proxy.
When you disconnect/reconnect, do you receive a new IP address or
anything similar? Can you somehow monitor the old IP address to see
if IE is sending data to that now-dead address?
My guess is...
What's the difference between findAndModify and update in MongoDB?
... @chaonextdoor findAndModify acquires a lock to the database when it starts the operation so that no other operation can process when it is running. When it finishes the operation it releases the lock.
– Lycha
May 28 '12 at 9:28
...
Regular expression matching a multiline block of text
...ight be useful: ^(.+?)\n\n((?:[A-Z]+\n)+)
The first character (^) means "starting at the beginning of a line". Be aware that it does not match the newline itself (same for $: it means "just before a newline", but it does not match the newline itself).
Then (.+?)\n\n means "match as few characters...
How do I undo the most recent local commits in Git?
...but keep your changes for a bit of editing before you do a better commit. Starting again from here, with C as your HEAD:
(F)
A-B-C
↑
master
You can do this, leaving off the --hard:
git reset HEAD~1
In this case the result is:
(F)
A-B-C
↑
master
In both cases, HEAD is just...
Objective-C implicit conversion loses integer precision 'NSUInteger' (aka 'unsigned long') to 'int'
...
"Starting February 1, 2015, new iOS apps uploaded to the App Store must include 64-bit support..." - Apple Developer News and Updates, October 20, 2014
– Pang
Dec 8 '14 at 3:32
...
Returning an array using C
...ation. I would definitley add some allocation check. Very good proposal to start with :)
– urkon
Jan 4 '18 at 13:47
Ob...
Proper way to declare custom exceptions in modern Python?
...
@neves for a start, using tuples to store exception information has no benefit over using a dictionary to do the same. If you are interested in the reasoning behind the exception changes, take a look at PEP352
– frnk...