大约有 40,000 项符合查询结果（耗时：0.0359秒） [XML]
How does Java handle integer underflows and overflows and how would you check for it?
...hods are intrinsics and will be replaced by machine specific code. A quick test showed Math.addExact being 30% faster than a copied method (Java 1.8.0_40).
– TilmannZ
Aug 23 '16 at 13:42
...
Does Javascript pass by reference? [duplicate]
...ble using the equal sign.. Take these simple examples.
var myString = 'Test string 1';
// Assignment - A link to the same place as myString
var sameString = myString;
// If I change sameString, it will not modify myString,
// it just re-assigns it to a whole new string
sameString = 'New strin...
How to detect if a variable is an array
...sOwnProperty && ; also, is this still an issue with IE7? my simple tests via task manager suggest that the memory got reclaimed after minimizing the browser...
– Christoph
Jun 29 '09 at 18:32
...
Ternary operator (?:) in Bash
...
Note that the = operator tests for string equality, not numeric equality (i.e. [[ 05 = 5 ]] is false). If you want numeric comparison, use -eq instead.
– Gordon Davisson
Oct 17 '10 at 19:54
...
Android Fragment onClick button Method
...le savedInstanceState) {
return inflater.inflate(R.layout.fragment_test, container, false);
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
fComm = (FragmentCommunicator) activity;
} catch (ClassCastExcept...
Swift native base class or NSObject
I tested out some isa swizzling with Swift, and found that it only works when NSObject is a super-class (directly or further up), or by using the '@objc' decoration. Otherwise it will follow a static- and vtable-dispatch style, like C++.
...
Unit testing with Spring Security
...vironment: session-scoped in a Servlet container, thread-scoped in a JUnit test, etc. The real limiting factor of a Singleton is when it provides an implementation that is inflexible to different environments.
share
...
How to retrieve a single file from a specific revision in Git?
...w $REV:$FILE
git show somebranch:from/the/root/myfile.txt
git show HEAD^^^:test/test.py
The command takes the usual style of revision, meaning you can use any of the following:
branch name (as suggested by ash)
HEAD + x number of ^ characters
The SHA1 hash of a given revision
The first few (maybe ...
Flatten nested dictionaries, compressing keys
...
Changed it to test for collections.MutableMapping to make it more generic. But for Python < 2.6, try..except is probably the best option.
– Imran
May 17 '11 at 7:55
...
How can I detect if a selector returns null?
...answer, but it would be helpful if you explain what happens if NONE of the tested elements exists. Short answer: TypeError: firstExistingElement.doSomething is not a function. You can wrap the entire variable assignment/test in an if() and only do something if an element is found....
...