大约有 31,840 项符合查询结果（耗时：0.0292秒） [XML]
Two-way encryption: I need to store passwords that can be retrieved
...e. There are some encryption schemes that are impossible to crack such as OneTimePad).
Where do I store the private key?
What I would do is use 3 keys. One is user supplied, one is application specific and the other is user specific (like a salt). The application specific key can be stored anywh...
Rotating a two-dimensional array in Python
... array came up. Searching for the optimal solution I found this impressive one-liner that does the job:
7 Answers
...
Set up Heroku and GoDaddy? [closed]
...domain ->
Launch (this will take you to the Domain Details)
Click 'DNS Zone File' tab
Remove the CNAME record named 'www' (which points to @)
Click 'Add record' -> CNAME(Alias) -> 'Host' should be www and
'Points to' should be your Heroku address (example
supermoo-bil-3411.herokuapp.com). T...
How to “pull” from a local branch into another one?
...rom the local repository instead of the origin repository. No fetching is done (because everything from the local repository is already here!). There's no advantage – both commands do more or less the same. If you are doing fast-forwards, you could use push . origin/branch:branch (not pull) to upd...
Java code To convert byte to Hexadecimal
...is sign-extended to a 32-bit int. To effectively undo this sign extension, one can mask the byte with 0xFF.
byte b = -1;
System.out.println(Integer.toHexString(b & 0xFF));
// prints "ff"
Another issue with using toHexString is that it doesn't pad with zeroes:
byte b = 10;
...
What's “tools:context” in Android layout files?
...associated with an activity. It can of course be associated with more than one, but at least one. In the tool, we need to know about this mapping (which at runtime happens in the other direction; an activity can call setContentView(layout) to display a layout) in order to drive certain features.
Ri...
Using PHP with Socket.io
...pplication through socket.io and websockets for actions that could not be done in full javascript.
example from the project website (communicate with websocket server through php)
php server
use ElephantIO\Client as Elephant;
$elephant = new Elephant('http://localhost:8000', 'socket.io', 1, fals...
Passing a single item as IEnumerable
...
Suppose you decided to create one enumerable to pass to two different methods... then the first one cast it to an array and changed the contents. You then pass it as an argument to another method, unaware of the change. I'm not saying it's likely, just th...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar
I'm trying to implement search code in my CoreData-based iPhone app. I'm not sure how to proceed. The app already has an NSFetchedResultsController with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confus...
how to delete all cookies of my website in php
...ere are 2 cookies with the same name, but with different domain settings. One of them will make it into the $_COOKIE array, and the other won't. But they will both be visible in HTTP_COOKIE. If you want to clean this situation up, this is the way to do it.
– dlo
...