大约有 15,000 项符合查询结果（耗时：0.0216秒） [XML]
Non-Relational Database Design [closed]
... single-user applications.
For example, you can usually read a file of 10,000 records AND sort it on a field in less than half a second, an acceptable response time.
Of course, there are reasons to use a database instead of a flat file -- relational operations, data integrity, multiuser capability...
How to decide when to use Node.js?
...de.js in this case
It is very lightweight and fast. There has been over 200000 visits on this website in three weeks and minimal server resources has been able to handle it all.
The counter is really easy to make to be real time.
Node.js was easy to configure.
There are lots of modules available f...
How should I choose an authentication library for CodeIgniter? [closed]
...managed to steal 9 million items of personal information from more than 70.000 Korean web sites in one automated hack in 2008.
These attacks are not brain surgery. If you leave your back doors wide open, you shouldn't delude yourself into a false sense of security by bolting the front. Moreover, if ...
Algorithm for classifying words for hangman difficulty levels as “Easy”,“Medium”, or “Hard”
... English corpora.
For example, among the 1,700 six-letter words in the 10,000 most common words in Project Gutenberg as of 2006, the most difficult ten are these:
[(6, 10, 'losing', 'eaoignvwch'),
(6, 10, 'monkey', 'erdstaoync'),
(6, 10, 'pulled', 'erdaioupfh'),
(6, 10, 'slaves', 'erdsacthkl'),...
CROSS JOIN vs INNER JOIN in SQL
...the rows, if you have 100 rows in each table with 1 to 1 match, you get 10.000 results, Innerjoin will only return 100 rows in the same situation.
These 2 examples will return the same result:
Cross join
select * from table1 cross join table2 where table1.id = table2.fk_id
Inner join
select * ...
In which order should floats be added to get the most precise result?
...t are accurate at the scale of the largest-magnitude value in the input (0.0000001% out), but for 4 of them the result is inaccurate at the scale of the true solution (100% out). The particular problem you're solving will tell you whether the former is good enough or not.
In fact, you can play a lo...
How exactly does CMake work?
...KLOC, maybe up to 100KLOG, using CMake seems a little bit like using a 100,000 dollar forestry tree removal machine to remove weeds from your 2 foot by 2 foot flower garden. (By the way, if you've never seen such a machine, you should look for one on youtube, they're amazing)
If your build system ...
How dangerous is it to compare floating point values?
...he result would need 25 bits of precision. Instead, it gets rounded (to 0x2000000 in the default rounding mode).
The fact that many results get rounded due to needing infinitely many places for the correct value. This includes both rational results like 1/3 (which you're familiar with from decimal w...
What are good examples of genetic algorithms/genetic programming solutions? [closed]
...nerations of this, I ended up with a population of genes that could turn $5000 into an average of about $10000 with no chance of death/brokeness (on the historical data, of course).
Unfortunately, I never got the chance to use this system live, since my boss lost close to $100,000 in less than 3 mo...
What is 'Context' on Android?
.... the Context, and the execStartActivity makes use of this context.
A 30,000 overview is this: the Instrumentation class keeps tracks of a list of Activities that it’s monitoring in order to do its work. This list is used to coordinate all of the activities and make sure everything runs smoothly...