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How long should SQL email fields be? [duplicate]
...long but do you really need worry about these long Email addresses? If someone can't login with a 100-char Email, do you really care? We actually prefer they can't.
Some statistical data may shed some light on the issue. We analyzed a database with over 10 million Email addresses. These addresses a...
Difference between abstraction and encapsulation?
...encapsulation is indeed a special kind of abstraction, namely a structural one. By considering something compound as a whole we basically ignore (abstract from) the details of how it is built up of something else, i.e. ignore its internal structure.
– proskor
J...
ctypes - Beginner
...ing an integer
The C++ code for a function which takes an integer and adds one to the returned value,
extern "C" int add_one(int i)
{
return i+1;
}
Saved as file test.cpp, note the required extern "C" (this can be removed for C code).
This is compiled using g++, with arguments similar to Chinma...
select * vs select column
...nt, a consequence is that Each row of data in a database must always be on one and only one page. It cannot span multiple Pages of data (except for special things like blobs, where the actual blob data is stored in separate Page-chunks, and the actual table row column then only gets a pointer...). ...
How do you rename a Git tag?
... if tag is annotated the new tag won't have the message of the old one, but it's a helpful info
– NickSoft
May 26 '11 at 15:34
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How do I pass a unique_ptr argument to a constructor or a function?
...: next(std::move(n)) {}
In order for the user to call this, they must do one of the following:
Base newBase(std::move(nextBase));
Base fromTemp(std::unique_ptr<Base>(new Base(...));
To take a unique pointer by value means that you are transferring ownership of the pointer to the function/...
How to change the href for a hyperlink using jQuery
...ses a simple regular expression to replace this part of the URL with a new one. Note the flexibility this gives you - any sort of modification to the link could be done here.
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FixedThreadPool vs CachedThreadPool: the lesser of two evils
...hould use for your situation as there are no negative consequence to using one for long running threads. The comment in the java doc about CachedThreadPools being suitable for short tasks merely suggest that they are particularly appropriate for such cases, not that they cannot or should not be use...
RESTful way to create multiple items in one request
... I must bring them also, and they will hear My voice; and they will become one flock with one shepherd." John 10:16.
– Evgeny
Sep 30 '17 at 10:20
1
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Unnamed/anonymous namespaces vs. static functions
...d namespaces slow down linking. use static
– Erik Aronesty
Jan 15 '15 at 18:20
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