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What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...ence', 1)
INSERT INTO post_comment (post_id, review, id)
VALUES (2, 'Must-read for Java developers', 2)
INSERT INTO post_comment (post_id, review, id)
VALUES (3, 'Five Stars', 3)
INSERT INTO post_comment (post_id, review, id)
VALUES (4, 'A great reference book', 4)
N+1 query problem with plain ...
Adding event listeners to dynamically added elements using jQuery [duplicate]
...ssible so it doesn't "bubble" up further then it needs to. I recommend you read up on event bubbling to get a better understanding.
– Jack
Jan 2 '19 at 20:26
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What do numbers using 0x notation mean?
...00--1999 would represent the negative numbers. My question was about human-readable notation, though knowing how computers do it might help someone else, so thanks :)
– Luc
Mar 7 at 10:07
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Why is require_once so bad to use?
Everything I read about better PHP coding practices keeps saying don't use require_once because of speed.
14 Answers
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Subdomain on different host [closed]
... throwing me off.
Thanks for both of the replies. I 'got it' as soon as I read Bryant's response which was first but Saif kicked it up a notch and added a little more detail.
Thanks!
share
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impro...
Abusing the algebra of algebraic data types - why does this work?
...nked to a paper about that in my answer but I could swear I remember first reading about it on your blog.
– C. A. McCann
Feb 8 '12 at 20:00
1
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Various ways to remove local Git changes
...It all depends on exactly what you are trying to undo/revert. Start out by reading the post in Ube's link. But to attempt an answer:
Hard reset
git reset --hard [HEAD]
completely remove all staged and unstaged changes to tracked files.
I find myself often using hard resetting, when I'm like "ju...
How do servlets work? Instantiation, sessions, shared variables and multithreading
...tore their scoped beans as an attribute of its closest matching scope.
Thread Safety
That said, your major concern is possibly thread safety. You should now know that servlets and filters are shared among all requests. That's the nice thing about Java, it's multithreaded and different threads (re...
public friend swap member function
... and others mistakenly thought would be the case. If you were bit by this, read here.
In short: the member function is just noise, the specialization is ugly and incomplete, but the friend function is complete and works. And when you swap, either use boost::swap or an unqualified swap with std::s...
What do
... not find implicit value for parameter evidence: =:=[Int,String]
You can read that error as "could not find evidence that Int == String"... that's as it should be! getStringLength is imposing further restrictions on the type of A than what Foo in general requires; namely, you can only invoke getSt...