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JPA EntityManager: Why use persist() over merge()?
...t to the entity manager.
merge:
Find an attached object with the same id and update it.
If exists update and return the already attached object.
If doesn't exist insert the new register to the database.
persist() efficiency:
It could be more efficient for inserting a new register to a data...
How can I update a single row in a ListView?
...u solve this with ListView#getFirstVisiblePosition().
Example:
private void updateView(int index){
View v = yourListView.getChildAt(index -
yourListView.getFirstVisiblePosition());
if(v == null)
return;
TextView someText = (TextView) v.findViewById(R.id.sometextview);...
drag drop files into standard html file input
...vent to register.
// See: https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Drag_operations#droptargets
dropContainer.ondragover = dropContainer.ondragenter = function(evt) {
evt.preventDefault();
};
dropContainer.ondrop = function(evt) {
// pretty simple -- but not for IE :(
f...
Is there a way of having git show lines added, lines changed and lines removed?
...
If you want to know the lines added/changed/deleted by a commit with
id commit-id, you could use
git show commit-id --stat
or
git diff commit-id-before commit-id --stat
If you wat to know the lines added/changed/deleted by a range
commits, you could use
git diff commit-id1 commit-id2 --s...
getSupportActionBar from inside of Fragment ActionBarCompat
...
After Fragment.onActivityCreated(...) you'll have a valid activity accessible through getActivity().
You'll need to cast it to an ActionBarActivity then make the call to getSupportActionBar().
((AppCompatActivity)getActivity()).getSupportActionBar().setSubtitle(R.string.subtit...
How do I convert a Django QuerySet into list of dicts?
...
Use the .values() method:
>>> Blog.objects.values()
[{'id': 1, 'name': 'Beatles Blog', 'tagline': 'All the latest Beatles news.'}],
>>> Blog.objects.values('id', 'name')
[{'id': 1, 'name': 'Beatles Blog'}]
Note: the result is a QuerySet which mostly behaves like a list...
What is the usefulness of PUT and DELETE HTTP request methods?
...
The DELETE method requests that the origin server delete the resource identified by the Request-URI. This method MAY be overridden by human intervention (or other means) on the origin server. The client cannot be guaranteed that the operation has been carried out, even if the status code return...
How to append data to div using JavaScript?
...
Try this:
var div = document.getElementById('divID');
div.innerHTML += 'Extra stuff';
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How can I have lowercase routes in ASP.NET MVC?
...rd by setting LowercaseUrls property of RouteCollection:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.LowercaseUrls = true;
routes.MapRoute(
name: "Default",
url: "{control...
How can I deserialize JSON to a simple Dictionary in ASP.NET?
...
I did discover .NET has a built in way to cast the JSON string into a Dictionary<String, Object> via the System.Web.Script.Serialization.JavaScriptSerializer type in the 3.5 System.Web.Extensions assembly. Use the method D...