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Using ping in c#
...
using System.Net.NetworkInformation;
public static bool PingHost(string nameOrAddress)
{
bool pingable = false;
Ping pinger = null;
try
{
pinger = new Ping();
PingReply reply = pinger.Send(nameOrAddress);
...
What are copy elision and return value optimization?
... or pass-by-value feasible in practice (restrictions apply).
It's the only form of optimization that elides (ha!) the as-if rule - copy elision can be applied even if copying/moving the object has side-effects.
The following example taken from Wikipedia:
struct C {
C() {}
C(const C&) { std::...
When to use valueChangeListener or f:ajax listener?
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The valueChangeListener will only be invoked when the form is submitted and the submitted value is different from the initial value. It's thus not invoked when only the HTML DOM change event is fired. If you would like to submit the form during the HTML DOM change event, then yo...
What's the effect of adding 'return false' to a click event listener?
...this would be following the link, but the difference is most noticeable in form submit handlers, where you can cancel a form submission if the user has made a mistake entering the information.
I don't believe there is a W3C specification for this. All the ancient JavaScript interfaces like this ha...
Capturing URL parameters in request.GET
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No problem. use request.GET if you submit a form using GET, use request.POST if you submit a form using POST, and if you just want to configure URLs to have variable sections, then it's a URLconf/view argument.
– camflan
Sep 29 '0...
classical inheritance vs prototypal inheritance in javascript
...r programs.
Theoretically an abstraction is defined as "a general concept formed by extracting common features from specific examples". However for the sake of this explanation we're going to use the aforementioned definition instead.
Now some objects have a lot of things in common. For example a ...
How to redirect to previous page in Ruby On Rails?
... /posts/new, this is set as the referer for the next request, so after the form is successfully submitted it shows the form again, i.e /posts/new. It does however work well for other purposes.
– Kris
Feb 1 '12 at 16:15
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What's the difference between window.location and document.location in JavaScript?
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Interestingly, if you have a frame, image, or form named 'location', then 'document.location' provides a reference to the frame window, image, or form, respectively, instead of the Location object. Apparently, this is because the document.forms, document.images, and wind...
UITableView - change section header color
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This is pretty outdated information and simply creating another view isn't the best answer. The idea is to get the proper view and change the color or tint on it. The answer below using willDisplayHeaderView is a much better approach.
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Handle file download from ajax post
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Create a form, use the POST method, submit the form - there's no need for an iframe. When the server page responds to the request, write a response header for the mime type of the file, and it will present a download dialog - I've do...