大约有 15,000 项符合查询结果（耗时：0.0387秒） [XML]
Best way to serialize an NSData into a hexadeximal string
...wift version
One liner:
let hexString = UnsafeBufferPointer<UInt8>(start: UnsafePointer(data.bytes),
count: data.length).map { String(format: "%02x", $0) }.joinWithSeparator("")
Here's in a reusable and self documenting extension form:
extension NSData {
func base16EncodedString(upp...
Most concise way to convert a Set to a List
...ne of the elements are null, and the only weird I notice is that the index starts at 1. However, if I just create a normal list the index starts at 0. Weird?
– Jack
Feb 19 '16 at 15:04
...
How to copy commits from one branch to another?
...an still use rebase to effectively do several cherry-picks at once:
# wss-starting-point is the SHA1/branch immediately before the first commit to rebase
git branch wss-to-rebase wss
git rebase --onto v2.1 wss-starting-point wss-to-rebase
git checkout v2.1
git merge wss-to-rebase
Note: the reason...
What is __init__.py for?
...)
Session = sessionmaker(bind=engine)
Since I define Session here, I can start a new session using the syntax below. This code would be the same executed from inside or outside of the "database" package directory.
from database import Session
session = Session()
Of course, this is a small conve...
How to put a unicode character in XAML?
...I did it like this:
<Button Grid.Column="1" Grid.RowSpan="2" Name="start" Margin="5" Click="start_Click">
<TextBlock Name="test" FontFamily="pack://application:,,,/Y_Yoga;Component/Resources/#FontAwesome">&#xF04B;</TextBlock>
</Button>
Hope to be helpfu...
What are the Dangers of Method Swizzling in Objective-C?
...wizzling in +(void)load. The load class method is executed serially at the start of your application. You won't have any issues with concurrency if you do your swizzling here. If you were to swizzle in +(void)initialize, however, you could end up with a race condition in your swizzling implementatio...
What is the convention for word separator in Java package names?
...pend underscore to them.
If any of the resulting package name components start with a digit, or any other character that is not allowed as an initial character of an identifier, have an underscore prefixed to the component.
References
JLS 6.1 Package Names
...
Difference Between Invoke and DynamicInvoke
...ice = x => x * 2;
const int LOOP = 5000000; // 5M
var watch = Stopwatch.StartNew();
for (int i = 0; i < LOOP; i++)
{
twice.Invoke(3);
}
watch.Stop();
Console.WriteLine("Invoke: {0}ms", watch.ElapsedMilliseconds);
watch = Stopwatch.StartNew();
for (int i = 0; i < LOOP; i++)
{
twice.D...
Embedding ads on Android app?
...app I have, but would like to embed ad on it. I am not sure where I should start? Is there a well known mobile ad company out there that is specialized in mobile advertising?
...
How to lazy load images in ListView in Android
... handler.sendMessage(message);
}
};
thread.start();
}
private InputStream fetch(String urlString) throws MalformedURLException, IOException {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet request = new HttpGet(urlString);
...