大约有 32,000 项符合查询结果（耗时：0.0531秒） [XML]
Asynctask vs Thread in android
...
For long-running or CPU-intensive tasks, there are basically two ways to do this: Java threads, and Android's native AsyncTask.
Neither one is necessarily better than the other, but knowing when to use each call is essential to leveraging the system's performance to your benefit....
AES Encryption for an NSString on the iPhone
...o does seem to work pretty decently... aside from the extra comma in each call to CCCrypt() which caused compile errors.
A later comment on that post includes this adapted code, which works for me, and seems a bit more straightforward. If you include their code for the NSData category, you can writ...
How to create a custom string representation for a class object?
...
@RobertSiemer Why? While his answer is not specifically targeting the OP's question, it's still helpful. It helped me. And at a glance, I don't see any question asking for instance implementation. So probably people land on this page first.
– akinuri
...
Effects of the extern keyword on C functions
...since it will be encountered later. Functions and variables are treated equally in this regard.
It's very useful if you need to share some global between modules and don't want to put / initialize it in a header.
Technically, every function in a library public header is 'extern', however labeling...
Chrome extension: accessing localStorage in content script
...xtension context, so you don't need content scripts or messaging. You can call localStorage directly from the options page or use chrome.extension.getBackgroundPage from the options page.
– Mohamed Mansour
Jul 23 '11 at 12:43
...
What is the reason for performing a double fork when creating a daemon?
... by setsid(). So, the first forked process becomes a session leader after calling setsid() and then we fork again so that the final, double-forked process is no longer a session leader. Other than the requirement of setsid() to be a session leader, you are spot on.
– dbmikus
...
What's the difference between Invoke() and BeginInvoke()
...y, on a threadpool thread.
Control.Invoke: Executes on the UI thread, but calling thread waits for completion before continuing.
Control.BeginInvoke: Executes on the UI thread, and calling thread doesn't wait for completion.
Tim's answer mentions when you might want to use BeginInvoke - although i...
How to exclude certain directories/files from git grep search
...va files from under your current directory).
There's a good reference for all the "magic words" allowed in a pathspec at git-scm.com (or just git help glossary). For some reason, the docs at kernel.org are really out of date even though they often come up first in google searches.
...
Why is XOR the default way to combine hashes?
...paper that explains that combining hashes securely where each function is called only once is not possible without outputting less bits than the sum of number of bits in each hash value. This suggest that this answer is not correct.
– Tamás Szelei
Jul 23 '12 a...
updating table rows in postgres using subquery
...
Postgres allows:
UPDATE dummy
SET customer=subquery.customer,
address=subquery.address,
partn=subquery.partn
FROM (SELECT address_id, customer, address, partn
FROM /* big hairy SQL */ ...) AS subquery
WHERE dummy.addre...