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C++ - passing references to std::shared_ptr or boost::shared_ptr
...ject it points to will still exist, because its reference count will be at least 1.
Class::only_work_with_sp(boost::shared_ptr<foo> sp)
{
// sp points to an object that cannot be destroyed during this function
}
So by using a reference to a shared_ptr, you disable that guarantee. So in ...
The key must be an application-specific resource id
...
The tag id must be unique so it wants it to be an id created in a resources file to guarantee uniqueness.
If the view will only contain one tag though you can just do
setTag(objContact.onlineid);
...
What is a proper naming convention for MySQL FKs?
...le name]_[referencing field name]
Example:
CREATE TABLE users(
user_id int,
name varchar(100)
);
CREATE TABLE messages(
message_id int,
user_id int
);
ALTER TABLE messages ADD CONSTRAINT fk_messages_users_user_id
FOREIGN KEY (user_id) REFERENCES users(user_id);
...
How to automatically generate a stacktrace when my program crashes
...ure the resulting backtrace points to the actual location of the fault (at least for some architectures - x86 & ARM).
The first two entries in the stack frame chain when you get into the signal handler contain a return address inside the signal handler and one inside sigaction() in libc. The sta...
What XML parser should I use in C++? [closed]
...ce (if that really bothers you, go use Xerces), though the interface is at least somewhat object-based and easily wrapped. It provides a lot of features, like XInclude support (with callbacks so that you can tell it where it gets the file from), an XPath 1.0 recognizer, RelaxNG and Schematron suppor...
How can I retrieve Id of inserted entity using Entity framework? [closed]
I have a problem with Entity Framework in ASP.NET. I want to get the Id value whenever I add an object to database. How can I do this?
...
How to measure time in milliseconds using ANSI C?
...s, the resulting value from clock() / CLOCKS_PER_SEC will be in seconds(at least it should be). Dividing by 1000 turns that into milliseconds.
– David Young
Jul 18 '12 at 0:08
14
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Get ID of last inserted document in a mongoDB w/ Java driver
Is there an easy way to get the ID (ObjectID) of the last inserted document of a mongoDB instance using the Java driver?
8 ...
How do I select an entire row which has the largest ID in the table?
...
You could use a subselect:
SELECT row
FROM table
WHERE id=(
SELECT max(id) FROM table
)
Note that if the value of max(id) is not unique, multiple rows are returned.
If you only want one such row, use @MichaelMior's answer,
SELECT row from table ORDER BY id DESC LIMIT...
Handling colon in element ID with jQuery
We are not able to access the div element with ID "test: abc" in JS code using jQuery.
9 Answers
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