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What is the lifetime of a static variable in a C++ function?
...2
Created in foo
Created in if
Destroyed in if
Destroyed in foo
[0] Since C++98[2] has no reference to multiple threads how this will be behave in a multi-threaded environment is unspecified, and can be problematic as Roddy mentions.
[1] C++98 section 3.6.3.1 [basic.start.term]
[2] In C++11 statics...
How would one write object-oriented code in C? [closed]
...ymorphism then yes, you can, we were doing that sort of stuff years before C++ came about.
Basically you use a struct to hold both the data and a list of function pointers to point to the relevant functions for that data.
So, in a communications class, you would have an open, read, write and close...
How to have an automatic timestamp in SQLite?
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INSERT INTO my_table(name, sqltime) VALUES('test1', '2010-05-28T15:36:56.200');
INSERT INTO my_table(name, sqltime) VALUES('test2', '2010-08-28T13:40:02.200');
INSERT INTO my_table(name) VALUES('test3');
This is the result:
SELECT * FROM my_table;
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实时开发、测试和调试工具 · App Inventor 2 中文网
...然后，当他们遇到错误时，他们将面临巨大的混乱，他们不知道哪些部分在工作，哪些部分不起作用。 所以尝试循序渐进地工作。 你仍然肯定会遇到错误，但增量开发将使你更快地隔离错误并更轻松地修复它们。
除了让你通...
How can I scroll a web page using selenium webdriver in python?
...window.scrollY
driver.execute_script("window.scrollTo(0, window.scrollY + 200)")
which will go to the current y scroll position + 200
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How to draw a custom UIView that is just a circle - iPhone app
...as follows:
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)];
view.backgroundColor = [UIColor blueColor];
CAShapeLayer *shape = [CAShapeLayer layer];
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:view.center radius:(view.bounds.size.width / 2) startAngle:0 endA...
In SQL, how can you “group by” in ranges?
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Neither of the highest voted answers are correct on SQL Server 2000. Perhaps they were using a different version.
Here are the correct versions of both of them on SQL Server 2000.
select t.range as [score range], count(*) as [number of occurences]
from (
select case
when score be...
How to calculate a time difference in C++
What's the best way to calculate a time difference in C++? I'm timing the execution speed of a program, so I'm interested in milliseconds. Better yet, seconds.milliseconds..
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Measuring execution time of a function in C++
I want to find out how much time a certain function takes in my C++ program to execute on Linux . Afterwards, I want to make a speed comparison . I saw several time function but ended up with this from boost. Chrono:
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What is “runtime”?
I have heard about things like "C Runtime", "Visual C++ 2008 Runtime", ".NET Common Language Runtime", etc.
14 Answers
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