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How to determine when Fragment becomes visible in ViewPager
...sible in ViewPager
You can do the following by overriding setUserVisibleHint in your Fragment:
public class MyFragment extends Fragment {
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser) {
...
Adding placeholder text to textbox
.... First we need to expose the Windows SendMessage function.
private const int EM_SETCUEBANNER = 0x1501;
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern Int32 SendMessage(IntPtr hWnd, int msg, int wParam, [MarshalAs(UnmanagedType.LPWStr)]string lParam);
Then simply call th...
Custom thread pool in Java 8 parallel stream
...a fork-join pool, it stays there and does not use the common one.
final int parallelism = 4;
ForkJoinPool forkJoinPool = null;
try {
forkJoinPool = new ForkJoinPool(parallelism);
final List<Integer> primes = forkJoinPool.submit(() ->
// Parallel task here, for example
...
Why does “return list.sort()” return None, not the list?
...
It's interesting that if an entry is added to a list, either a.append('x'), or a.extend('x) you can't chain sort() on the end either. It has to be split into 2 lines. It would have been nicer had the methods returned the list! d...
How do I include inline JavaScript in Haml?
.../tr>
{% } %}
</script>
At first I used the :cdata to convert (from html2haml), it doesn't work properly (Delete button can't remove relevant component in callback).
<script id='template-download' type='text/x-tmpl'>
<![CDATA[
{% for (var i=0, fil...
Parallel.ForEach vs Task.Factory.StartNew
...
The first is a much better option.
Parallel.ForEach, internally, uses a Partitioner<T> to distribute your collection into work items. It will not do one task per item, but rather batch this to lower the overhead involved.
The second option will schedule a single Task pe...
What happens when a duplicate key is put into a HashMap?
...n key (or null if none present), so you can determine what was there and maintain a reference if necessary.
More information here: HashMap Doc
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Why am I not getting a java.util.ConcurrentModificationException in this example?
...ecific case, first off, i don't think final is a way to go considering you intend to modify the list past declaration
private static final List<Integer> integerList;
Also consider modifying a copy instead of the original list.
List<Integer> copy = new ArrayList<Integer>(integer...
Android LocationClient class is deprecated but used in documentation
...ority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(1000); // Update location every second
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSu...
How to track down a “double free or corruption” error
...olerant version of malloc, which will cause your program to abort at the point where the double free is done.
You can set this from gdb by using the set environment MALLOC_CHECK_ 2 command before running your program; the program should abort, with the free() call visible in the backtrace.
see the...