大约有 47,000 项符合查询结果（耗时：0.0494秒） [XML]
Has anyone actually implemented a Fibonacci-Heap efficiently?
...lemented a Fibonacci-Heap ? I did so a few years back, but it was several orders of magnitude slower than using array-based BinHeaps.
...
In Ruby, is there an Array method that combines 'select' and 'map'?
...ns as its eager version. It doesn't speed anything up, it just changes the order of execution of each iteration—the last function in the chain "pulls" values as needed from the previous functions in reverse order.
– pje
Feb 13 '18 at 17:15
...
Multiprocessing - Pipe vs Queue
...nd nice that you provided benchmarks! I only have two tiny quibbles: (1) "orders of magnitude faster" is a bit of an overstatement. The difference is x3, which is about a third of one order of magnitude. Just saying. ;-); and (2) a more fair comparison would be running N workers, each communicati...
Useful example of a shutdown hook in Java?
...n sequence it will start all registered shutdown hooks in some unspecified order and let them run concurrently. When all the hooks have finished it will then run all uninvoked finalizers if finalization-on-exit has been enabled. Finally, the virtual machine will halt.
That is, a shutdown hook keep...
What is the mouse down selector in CSS?
... Add in that case I would style the button more fully. By adding a border:0; you lose the bezel around the button and the issue you are having.
– jansmolders86
May 23 '13 at 14:04
...
Fast permutation -> number -> permutation mapping algorithms
...be very small. This can "easily" be reduced to O(nlogn) though, through an order statistics tree (pine.cs.yale.edu/pinewiki/OrderStatisticsTree), i.e. a red-black tree which initially will contains the values 0, 1, 2, ..., n-1, and each node contains the number of descendants below it. With this, on...
How do you automatically set text box to Uppercase?
...le="text-transform:uppercase" />
<img src="../images/tickmark.gif" border="0" />
Please note this transformation is purely visual, and does not change the text that is sent in POST.
share
|
...
Can you create nested WITH clauses for Common Table Expressions?
...
These answers are pretty good, but as far as getting the items to order properly, you'd be better off looking at this article
http://dataeducation.com/dr-output-or-how-i-learned-to-stop-worrying-and-love-the-merge
Here's an example of his query.
WITH paths AS (
SELECT
Employ...
In laymans terms, what does 'static' mean in Java? [duplicate]
... public void someMethod() { };
public Class SomeInnerClass { };
}
In order to use someField, someMethod, or SomeInnerClass I have to first create an instance of SomeObject.
public class SomeOtherObject {
public void doSomeStuff() {
SomeObject anInstance = new SomeObject();
...
Removing MySQL 5.7 Completely [closed]
...pt-get purge mysql-client-core-5.7
sudo rm -rf /var/log/mysql
sudo rm -rf /etc/mysql
All above commands in single line (just copy and paste):
sudo service mysql stop && sudo killall -9 mysql && sudo killall -9 mysqld && sudo apt-get remove --purge mysql-server mysql-client...