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How can a Java variable be different from itself?
...
One simple way is to use Float.NaN:
float x = Float.NaN; // <--
if (x == x) {
System.out.println("Ok");
} else {
System.out.println("Not ok");
}
Not ok
You can do the same with Double.NaN.
From JLS §15.21.1....
Error: Tablespace for table xxx exists. Please DISCARD the tablespace before IMPORT
...ir /tmp/mysql_orphans
$ mv /var/lib/mysql/table3.ibd /tmp/mysql_orphans/
One caveat though, make sure what ever is causing the problem originally, e.g. long running query, locked table, etc... has been cleared. Otherwise you just end up with another orphaned .ibd file when you try a second time.
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When is the init() function run?
... answered Jul 16 '14 at 20:46
OneOfOneOneOfOne
75.8k1313 gold badges150150 silver badges159159 bronze badges
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When do you use POST and when do you use GET?
... collects a password or other sensitive information is not the best idea.
One final note: POST can transmit a larger amount of information than GET. 'POST' has no size restrictions for transmitted data, whilst 'GET' is limited to 2048 characters.
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How do I test an AngularJS service with Jasmine?
...describe('myService test', function(){
describe('when I call myService.one', function(){
it('returns 1', function(){
var $injector = angular.injector([ 'myModule' ]);
var myService = $injector.get( 'myService' );
expect( myService.one ).toEqual(1);
...
Implementing MVC with Windows Forms
...anged for your application. (Service-oriented architecture)
Updates being done by CRUD operations
Updates being done with the command pattern (sending commands to backend server)
Lots of usages of data binding / no usages of data binding
Most data being “table like” (e.g. invoices) that work wel...
Is there a point to minifying PHP?
...er named HipHop that transforms PHP source into C++ code. Rasmus Lerdorf, one of the big PHP guys did a presentation for Digg earlier this year that covers the performance improvements given by HipHop. In short, it's not too much faster than optimizing code and using a bytecode cache. HipHop is o...
Getting an element from a Set
...
If you have an equal object, why do you need the one from the set? If it is "equal" only by a key, an Map would be a better choice.
Anyway, the following will do it:
Foo getEqual(Foo sample, Set<Foo> all) {
for (Foo one : all) {
if (one.equals(sample)) {
...
How do you unit test a Celery task?
...aly do 2 different test sessions when working with celery tasks. The first one (as I'm suggesting bellow) is completely synchronous and should be the one that makes sure the algorithm does what it should do. The second session uses the whole system (including the broker) and makes sure I'm not havin...
Add column with constant value to pandas dataframe [duplicate]
.... In general, pandas tries to do as much alignment of indices as possible. One downside is that when indices are not aligned you get NaN wherever they aren't aligned. Play around with the reindex and align methods to gain some intuition for alignment works with objects that have partially, totally, ...