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Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...e multiplies in it, no divide. => Faster!
And: the full update step new_x = x + dx then reads:
x *= 3/2 - y/2 * x * x which is easy too.
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fo...
Custom attributes in styles.xml
...
<style name="CustomStyle">
<item name="android:layout_width">wrap_content</item>
<item name="android:layout_height">wrap_content</item>
<item name="custom_attr">value</item> <!-- tee hee -->
</style>
</resourc...
Is there some way to PUSH data from web server to browser?
...
Yes, what you're looking for is COMET http://en.wikipedia.org/wiki/Comet_(programming). Other good Google terms to search for are AJAX-push and reverse-ajax.
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Knight's Shortest Path on Chessboard
...oints in a graph can be found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm
Pseudo-code from wikipedia-page:
function Dijkstra(Graph, source):
for each vertex v in Graph: // Initializations
dist[v] := infinity // Unknown distance function from source to ...
Spring Test & Security: How to mock authentication?
...(basicUser, Arrays.asList(
new SimpleGrantedAuthority("ROLE_USER"),
new SimpleGrantedAuthority("PERM_FOO_READ")
));
User managerUser = new UserImpl("Manager User", "manager@company.com", "password");
UserActive managerActiveUser = new UserActi...
C++ catching all exceptions
...s, but it should be considered bad design. You can use c++11's new current_exception mechanism, but if you don't have the ability to use c++11 (legacy code systems requiring a rewrite), then you have no named exception pointer to use to get a message or name. You may want to add separate catch cl...
AngularJS ng-click stopPropagation
...t should be stopped:
$scope.childHandler = function ($event) {
if (wanna_stop_it()) {
$event.stopPropagation();
}
...
};
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Waiting until two async blocks are executed before starting another block
...y Programming Guide
Your example could look something like this:
dispatch_group_t group = dispatch_group_create();
dispatch_group_async(group,dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^ {
// block1
NSLog(@"Block1");
[NSThread sleepForTimeInterval:5.0];
NSLog(@"Bl...
Can an interface extend multiple interfaces in Java?
...nterface B with boolean test()? (Is this a cousin of the diamond problem?) __Tried it and the sensible thing happens: not allowed if the return type is different.
– Daniel
Jan 6 '15 at 17:38
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CGridCellNumeric - A numeric cell class for the MFC Grid - C/C++ - 清泛网 - 专注IT技能提升
... is done on the fly as the user is typing. All validation is done in the EN_UPDATE message handler, so any cut/copy and paste operations are immediately validated. If the user deletes the text in the cell, the value is set to zero.
Using the CGridCellNumeric class
Download and unzip the ...