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Entity Framework 4 - AddObject vs Attach
I have been working with Entity Framework 4 recently, and am slightly confused as to when to use ObjectSet.Attach , and ObjectSet.AddObject .
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What is the difference between packaged_task and async
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Actually the example you just gave shows the differences if you use a rather long function, such as
//! sleeps for one second and returns 1
auto sleep = [](){
std::this_thread::sleep_for(std::chrono::seconds(1));
return...
Circular gradient in android
...olling, you're right that the android:gradientRadius="250" doesn't work at all, I guess it behaved differently on older Android versions.
– Justin
Apr 22 '15 at 14:58
add a co...
Difference between size_t and std::size_t
...ize_t and std::size_t in terms of where they are declared, when they should be used and any other differentiating features?
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font-style: italic vs oblique in CSS
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In the purest (type designer) sense, an oblique is a roman font that has been skewed a certain number of degrees (8-12 degrees, usually). An italic is created by the type designer with specific characters (notably lowercase a) drawn ...
How to update a record using sequelize for node?
...gt;
handleError(err)
)
Update 2016-03-09
The latest version actually doesn't use success and error anymore but instead uses then-able promises.
So the upper code will look as follows:
Project.update(
{ title: 'a very different title now' },
{ where: { _id: 1 } }
)
.then(result =&g...
Is it possible to implement a Python for range loop without an iterator variable?
...ou can just live with the extra i variable.
Here is the option to use the _ variable, which in reality, is just another variable.
for _ in range(n):
do_something()
Note that _ is assigned the last result that returned in an interactive python session:
>>> 1+2
3
>>> _
3
F...
Why are C# 4 optional parameters defined on interface not enforced on implementing class?
I noticed that with the optional parameters in C# 4 if you specify an optional parameter on an interface you don,t have to make that parameter optional on any implementing class:
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How to access maven.build.timestamp for resource filtering
I am using maven 3.0.4 and would like to make the build timestamp accessible to my application. For this, I'm putting a placeholder in a .properties file and let maven filter on build. While this is working fine for ${project.version} , ${maven.build.timestamp} is not substituted on filtering. ...
Hidden features of Perl?
What are some really useful but esoteric language features in Perl that you've actually been able to employ to do useful work?
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