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How to detect Ctrl+V, Ctrl+C using JavaScript?
... I needed to enable users to select an "element" (calendar entry) in a web app I'm writing, hit ctrl + c to "copy" it, then ctrl+v to "paste" it, all without actually interacting with the allmighty blessed clipboard. ctrl+c I remember what they're clicked on, ctrl+v I duplicate it, everyone wins.
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back button callback in navigationController in iOS
... Jockusch's answer solve this problem with easy trick.
-(void) viewWillDisappear:(BOOL)animated {
if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {
// back button was pressed. We know this is true because self is no longer
// in the navigation stac...
Preferred Java way to ping an HTTP URL for availability
...e request method. However, you need to take into account that some poor webapps or homegrown servers may return HTTP 405 error for a HEAD (i.e. not available, not implemented, not allowed) while a GET works perfectly fine. Using GET is more reliable in case you intend to verify links/resources not d...
HTTP 1.0 vs 1.1
...officially require a Host header, but it doesn't hurt to add one, and many applications (proxies) expect to see the Host header regardless of the protocol version.
Example:
GET / HTTP/1.1
Host: www.blahblahblahblah.com
This header is useful because it allows you to route a message through proxy ...
Android ListView not refreshing after notifyDataSetChanged
...tview. Instead first check if the listview has a adapter and then call the appropriate method.
I think its not a very good idea to create a new instance of the adapter while setting the list view. Instead, create an object.
BuildingAdapter adapter = new BuildingAdapter(context);
if(getListVie...
How do I define global variables in CoffeeScript?
...dow object, instead there's the exports object that gets passed into the wrapper that wraps the Node.js module (See: https://github.com/ry/node/blob/master/src/node.js#L321 ), so in Node.js what you would need to do is exports.foo = 'baz';.
Now let us take a look at what it states in your quote fro...
Rails 4: List of available datatypes
...ress
:ip_address
:mac_address
They are stored as strings if you run your app with a not-PostgreSQL database.
Edit, 2016-Sep-19:
There's a lot more postgres specific datatypes in Rails 4 and even more in Rails 5.
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Android Fragment onClick button Method
... return a;
}
}
http://developer.android.com/training/basics/firstapp/starting-activity.html
http://developer.android.com/training/basics/fragments/communicating.html
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Find unused npm packages in package.json
...t and find the unused dependencies:
depcheck
The good thing about this approach is that you don't have to remember the find or grep command.
To run without installing use npx:
npx depcheck
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URL Fragment and 302 redirects
...long
with some clarifications as to when use of fragments would not be
appropriate. (Section 7.1.2)
The important points from Section 7.1.2. Location:
If the Location value provided in a 3xx (Redirection) response does
not have a fragment component, a user agent MUST process the
redir...