大约有 42,000 项符合查询结果（耗时：0.0484秒） [XML]
Python SQL query string formatting
...bugging
my application I'd like to log to file all the sql query strings, and it is
important that the string is properly formated.
...
Differences between strong and weak in Objective-C
...eference to it. Once that is no longer the case, the object gets destroyed and your weak property will automatically get set to nil. The most frequent use cases of weak references in iOS are:
delegate properties, which are often referenced weakly to avoid retain cycles, and
subviews/controls of a ...
UnboundLocalError on local variable when reassigned after first use
The following code works as expected in both Python 2.5 and 3.0:
12 Answers
12
...
What's the difference between Require.js and simply creating a element in the DOM? [closed]
...e farther from the truth. It definitely has a steep learning curve for you and anyone else who will come to work in that project.
– Sahat Yalkabov
Sep 30 '13 at 3:06
3
...
Why not use always android:configChanges=“keyboardHidden|orientation”?
I was wondering why not use android:configChanges="keyboardHidden|orientation" in every (almost every ;)) activity?
...
Can Protractor and Karma be used together?
...://github.com/angular/protractor/issues/9#issuecomment-19927049
Protractor and Karma should not be used together; instead they provide separate systems for running tests. Protractor and Karma cover different aspects of testing - Karma is intended mostly for unit tests, while Protractor should be use...
JavaScript and Threads
...ol API
WHATWG has a Draft Recommendation for worker threads: Web Workers
And there's also Mozilla’s DOM Worker Threads
Update: June 2009, current state of browser support for JavaScript threads
Firefox 3.5 has web workers. Some demos of web workers, if you want to see them in action:
Simu...
What's the difference between HEAD^ and HEAD~ in Git?
...n I specify an ancestor commit object in Git, I'm confused between HEAD^ and HEAD~ .
15 Answers
...
When to use -retainCount?
I would like to know in what situation did you use -retainCount so far, and eventually the problems that can happen using it.
...
With arrays, why is it the case that a[5] == 5[a]?
...
The C standard defines the [] operator as follows:
a[b] == *(a + b)
Therefore a[5] will evaluate to:
*(a + 5)
and 5[a] will evaluate to:
*(5 + a)
a is a pointer to the first element of the array. a[5] is the value that's 5 el...