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For loop example in MySQL
...
drop table if exists foo;
create table foo
(
id int unsigned not null auto_increment primary key,
val smallint unsigned not null default 0
)
engine=innodb;
drop procedure if exists load_foo_test_data;
delimiter #
create procedure load_foo_test_data()
begin
declare v_max...
Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...lay = PlatformUI.createDisplay();
3 try {
4 int returnCode = PlatformUI.createAndRunWorkbench(display, new ApplicationWorkbenchAdvisor());
5 if (returnCode == PlatformUI.RETURN_RESTART) {
6 return IPlatformRunnable.EXIT_REST...
Save classifier to disk in scikit-learn
...ier parameters is sparse (as in most text classification examples) you can convert the parameters from dense to sparse which will make a huge difference in terms of memory consumption, loading and dumping. Sparsify the model by:
clf.sparsify()
Which will automatically work for SGDClassifier but i...
Do Java arrays have a maximum size?
...ugh it's very easy to test.
In a recent HotSpot VM, the correct answer is Integer.MAX_VALUE - 5. Once you go beyond that:
public class Foo {
public static void main(String[] args) {
Object[] array = new Object[Integer.MAX_VALUE - 4];
}
}
You get:
Exception in thread "main" java.lang.Ou...
Changing Font Size For UITableView Section Headers
...
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
In Swift:
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView?
Try something like this:
In Objective-C:
- (UIView *)tableView:(UITableView *)tableView viewForHeade...
How to get the ThreadPoolExecutor to increase threads to max before queueing?
...ionHandler will be called. It is the handler which then does the put(...) into the queue.
It certainly is strange to write a queue where offer(...) can return false and put() never blocks so that's the hack part. But this works well with TPE's usage of the queue so I don't see any problem with do...
How do you rotate a two dimensional array?
...
Here it is in C#
int[,] array = new int[4,4] {
{ 1,2,3,4 },
{ 5,6,7,8 },
{ 9,0,1,2 },
{ 3,4,5,6 }
};
int[,] rotated = RotateMatrix(array, 4);
static int[,] RotateMatrix(int[,] matrix, int n) {
int[,] ret = new int[n, n];...
Implementation difference between Aggregation and Composition in Java
... performs its functions through an Engine, but the Engine is not always an internal part of the Car. Engines may be swapped, or even completely removed. Not only that, but the outside world can still have a reference to the Engine, and tinker with it regardless of whether it's in the Car.
...
Collection was modified; enumeration operation may not execute
...omic operation. What's even funnier, ToList bascially does its own foreach internally to copy items into a new list instance, meaning you fixed a foreach problem by adding an additional (although quicker) foreach iteration.
– Groo
Jun 15 '15 at 13:26
...
error: request for member '..' in '..' which is of non-class type
...d" parameter so that this usage would have been allowed from consistency point of view. If I am not mistaken, K&R C had mandatory usage of term void.
– Rajesh
Jan 22 '18 at 5:08
...