大约有 2,340 项符合查询结果（耗时：0.0188秒） [XML]
Performance surprise with “as” and nullable types
...mpatible with the memory layout of Nullable<int>. A conversion is required and the code is tricky due to possible boxed enum types. The JIT compiler generates a call to a CLR helper function named JIT_Unbox_Nullable to get the job done. This is a general purpose function for any value type,...
getViewTypeCount and getItemViewType methods of ArrayAdapter
...tatement to inflate a different xml file depending on which view type is required.
You fill the view with information.
You return the view, exiting getView, and your row's view is displayed to the user.
Now, when a view is recycled by scrolling off the screen it goes into a recycled views pool tha...
How are software license keys generated?
...^ digit[i];
}
lastDigit = x % 10;
CORRECT WAY TO DO IT
Windows XP takes quite a bit of information, encrypts it, and puts the letter/number encoding on a sticker. This allowed MS to both verify your key and obtain the product-type (Home, Professional, etc.) at the same time. Additionally, it re...
How to loop through file names returned by find?
...t with this part: -exec process {} \; and my guess is that's a whole other question--what does that mean and how do I manipulate it? Where's a good Q/A or doc. on it?
– Alex Hall
Aug 20 '16 at 4:31
...
Reordering of commits
...ou with a list of the commits in this range. Reorder them and tell git to squash the appropriate ones:
pick c ...
pick a ...
squash d ...
squash e ...
squash g ...
pick b
squash f
Now the history should look like this:
c - [a+d+e+g] - [b+f] (branchA)
/
--o-x-x-x-x-x-x-x-x-x-x (master)
N...
addEventListener vs onclick
...he examples, which is standard for probably 95% of use cases. There is no equivalent argument for attachEvent, or when using inline events.
Inline events (HTML onclick="" property and element.onclick)
In all browsers that support javascript, you can put an event listener inline, meaning right in t...
What are some uses of decltype(auto)?
...)...);
}
Delaying return type deduction in recursive templates
In this Q&A a few days ago, an infinite recursion during template instantiation was encountered when the return type of the template was specified as decltype(iter(Int<i-1>{})) instead of decltype(auto).
template<int i&...
Checking images for similarity with OpenCV
...de to entire research magazines.
I will outline the most common such techniques and their results.
Comparing histograms
One of the simplest & fastest methods. Proposed decades ago as a means to find picture simmilarities. The idea is that a forest will have a lot of green, and a human face a lot...
ViewPager and fragments — what's the right way to store fragment's state?
....commit();
}
...
}
When using a FragmentPagerAdapter, we relinquish fragment management to the adapter, and do not have to perform the above steps. By default, it will only preload one Fragment in front and behind the current position (although it does not destroy them unless you are us...
Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
... Ethernet cable)
a laptop (ubuntu)
a Raspberry Pi (I have the Pi2)
Prerequisites on your ubuntu
Install network-manager
$sudo apt-get install network-manager
Install nmap
$sudo apt-get install nmap
Edit Wired connection on your laptop (Ubuntu)
Change IpV4 settings to "Share to other comp...