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How to get href value using jQuery?
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You need
var href = $(this).attr('href');
Inside a jQuery click handler, the this object refers to the element clicked, whereas in your case you're always getting the href for the first <a> on the page. This, incidentally, is why your example works but your real c...
How to calculate a time difference in C++
...rono>
class Timer
{
public:
Timer() : beg_(clock_::now()) {}
void reset() { beg_ = clock_::now(); }
double elapsed() const {
return std::chrono::duration_cast<second_>
(clock_::now() - beg_).count(); }
private:
typedef std::chrono::high_resolution_cloc...
Prevent dialog dismissal on screen rotation in Android
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The best way to avoid this problem nowadays is by using a DialogFragment.
Create a new class which extends DialogFragment. Override onCreateDialog and return your old Dialog or an AlertDialog.
Then you can show it with DialogFragment.show(fra...
Vertically align text within a div [duplicate]
The code below (also available as a demo on JS Fiddle ) does not position the text in the middle, as I ideally would like it to. I cannot find any way to vertically centre text in a div , even using the margin-top attribute. How can I do this?
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MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
...ot a couple of duplicates in a database that I want to inspect, so what I did to see which are duplicates, I did this:
10 A...
Create Windows service from executable
...owing error upon trying to start the service:
Error 1053: The service did not respond to the start or control request in a timely fashion.
There are tools that can create a Windows Service from arbitrary, non-service executables, see the other answers for examples of such tools.
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Xcode Debugger: view value of variable
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Now in the Debug Area look for this buttons and click the one in the middle. You will notice your area is now divided in two.
Now run your application.
When the first Breakpoint is reached during the execution of your program you will see on the left side all your variables available at t...
Popup弹出菜单扩展 · App Inventor 2 中文网
...屏幕，而且配置视图的选项很少。这里介绍的扩展是Android弹出菜单的包装器。几乎所有属性都是可调的。
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功能概述
Popup弹出菜单扩展是一个And...
Any reason not to start using the HTML 5 doctype? [closed]
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Well consider this:
When serving as text/html, all you need a doctype for is to trigger standards mode. Beyond that, the doctype does nothing as far as browsers are concerned.
When serving as text/html, whether you use XHTML markup ...
MongoDB: Is it possible to make a case-insensitive query?
...ance, I have a User table that has a username which is mixed case, but the id is an uppercase copy of the username. This ensures case-sensitive duplication is impossible (having both "Foo" and "foo" will not be allowed), and I can search by id = username.toUpperCase() to get a case-insensitive sear...