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Provide an image for WhatsApp link sharing
...r even store the website preview to their database. This means when you're testing your link in WhatsApp or Facebook for example, you'll most likely not see any difference right away. Using another link (another page) will do the trick. But as soon as you use that link once, this "please note" secti...
Using the “final” modifier whenever applicable in Java [closed]
...void common cases of a NullPointerException:
final FileInputStream in;
if(test)
in = new FileInputStream("foo.txt");
else
System.out.println("test failed");
in.read(); // Compiler error because variable 'in' might be unassigned
By preventing a variable from being assigned more than once, you ...
What is a lambda expression in C++11?
...xplicit parameterization can then be performed gradually with intermediate testing after each step. Once you have the code-block fully parameterized (as demonstrated by the removal of the &), you can move the code to an external location and make it a normal function.
Similarly, you can use la...
What differences, if any, between C++03 and C++11 can be detected at run-time?
...
return sizeof(&A::operator int&& +a) == sizeof(Y);
}
That test-case doesn't work for C++0x in GCC (looks like a bug) and doesn't work in C++03 mode for clang. A clang PR has been filed.
The modified treatment of injected class names of templates in C++11:
template<typename T>...
How can I negate the return-value of a process?
...at you don't have Bash as your shell (for ex.: git scripts, or puppet exec tests) you can run:
echo '! ls notexisting' | bash
-> retcode: 0
echo '! ls /' | bash
-> retcode: 1
share
|
im...
How to implement Enums in Ruby?
...Ruby's expressive power. To avoid problems, most Ruby programmers practice test-driven design, which will find not just typos but also logic errors.
– emk
Aug 20 '09 at 20:14
10
...
What is the relative performance difference of if/else versus switch statement in Java?
...
Use switch!
I hate to maintain if-else-blocks! Have a test:
public class SpeedTestSwitch
{
private static void do1(int loop)
{
int temp = 0;
for (; loop > 0; --loop)
{
int r = (int) (Math.random() * 10);
switch (r)
...
Convert form data to JavaScript object with jQuery
...ta in the first place?" Because serializeArray is already written, is unit tested in multiple browsers, and could theoretically be improved in later versions of jQuery. The less code you write that has to access inconsistent things like DOM elements directly, the more stable your code will be.
...
What is the difference between XMLHttpRequest, jQuery.ajax, jQuery.post, jQuery.get
...h API (experimental at this time) are the only in DOM, so should be the fastest.
I saw a lot of information that is not accurate anymore, so I made a test page where anyone can test version from version which one is best at any time:
https://jsperf.com/xhr-vs-jquery-ajax-vs-get-vs-fetch
From my t...
What does do?
...E9 or IE8, then I would recommend using the tag. If you only support the latest browsers (IE11 and/or Edge) then I would consider dropping this tag altogether. If you use Twitter Bootstrap and need to eliminate validation warnings, this tag must appear in its specified order. Additional info below:
...