大约有 7,000 项符合查询结果（耗时：0.0207秒） [XML]
Which Architecture patterns are used on Android? [closed]
...oller. Since it is handling displaying a window to the user, with the additional view components you have added to it with setContentView, and also handling events for at least the various activity life cycle events.
In MVC, the controller is supposed to be the main entry point. Which is a bit deba...
Convert Mercurial project to Git [duplicate]
...oject, but I would like to keep the commit history intact. My current solution was to just remove hg related files and then git init && add manually the files I needed, but that would not keep the history. Are there any solutions to this?
...
How to convert local time string to UTC?
...This is an instance of datetime.datetime with no attached timezone information. See documentation for datetime.strptime for information on parsing the date string.
Use the pytz module, which comes with a full list of time zones + UTC. Figure out what the local timezone is, construct a timezone obje...
Increasing the maximum number of TCP/IP connections in Linux
I am programming a server and it seems like my number of connections is being limited since my bandwidth isn't being saturated even when I've set the number of connections to "unlimited".
...
Bash: infinite sleep (infinite blocking)
...u look at it with strace tail -f /dev/null you will notice, that this solution is far from blocking! It's probably even worse than the sleep solution in the question, as it uses (under Linux) precious resources like the inotify system. Also other processes which write to /dev/null make tail loop. ...
Infinite scrolling with React JS
...st adds nodes to the DOM and doesn't remove them. Is there any proven solution with React which will add, remove and maintains constant number of nodes in the DOM.
...
Are custom elements valid HTML5?
...
The Custom Elements specification is available in Chrome and Opera, and becoming available in other browsers. It provides a means to register custom elements in a formal manner.
Custom elements are new types of DOM elements that can be defined by
authors...
How can I make an svg scale with its parent container?
...,10 20,10 10,0" />
</svg>
Note that by default, the aspect ratio is preserved. So if you specify that the element should have a width of 100%, but a height of 50px, it will actually only scale up to the height of 50px (unless you have a very narrow window):
<svg width="100%" height=...
In which situations do we need to write the __autoreleasing ownership qualifier under ARC?
...
You're right. As the official documentation explains:
__autoreleasing to denote arguments that are passed by reference (id *) and are autoreleased on return.
All of this is very well explained in the ARC transition guide.
In your NSError example, the declara...
Does Redis persist data?
...
I suggest you read about this on http://redis.io/topics/persistence . Basically you lose the guaranteed persistence when you increase performance by using only in-memory storing. Imagine a scenario where you INSERT into memory, but before it gets persisted to disk lose p...