大约有 43,000 项符合查询结果（耗时：0.0527秒） [XML]
What is the difference between supervised learning and unsupervised learning? [closed]
In terms of artificial intelligence and machine learning, what is the difference between supervised and unsupervised learning?
Can you provide a basic, easy explanation with an example?
...
What Computer Science concepts should I know? [closed]
... etc). You should be able to produce sensible OO designs as well as understanding the concepts.
Scripting and regexes.
Data structures -- lists, sets, hashtables, trees, graphs, and so on -- as well as Big O notation and algorithmic complexity.
Bits, bytes and binary numbers -- how numbers are repre...
Cocoa: What's the difference between the frame and the bounds?
UIView and its subclasses all have the properties frame and bounds . What's the difference?
12 Answers
...
Among $_REQUEST, $_GET and $_POST which one is the fastest?
...
$_REQUEST, by default, contains the contents of $_GET, $_POST and $_COOKIE.
But it's only a default, which depends on variables_order ; and not sure you want to work with cookies.
If I had to choose, I would probably not use $_REQUEST, and I would choose $_GET or $_POST -- depending ...
Commonly accepted best practices around code organization in JavaScript [closed]
...JavaScript frameworks like jQuery make client side web applications richer and more functional, I've started to notice one problem...
...
Regex Pattern to Match, Excluding when… / Except between
...ome useful ideas but I want something more complete that I can 100% understand and reuse; that's why I set a bounty. Also ideas that work everywhere are better for me than not standard syntax like \K
...
Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
...
Several ill-conceived ideas found their way into the standard: auto_ptr, vector<bool>, valarray and export, just to name a few. So I wouldn't take the presence of IOStreams necessarily as a sign of quality design.
IOStreams have a checkered history. They are actually a rew...
Parameterize an SQL IN clause
...
Here's a quick-and-dirty technique I have used:
SELECT * FROM Tags
WHERE '|ruby|rails|scruffy|rubyonrails|'
LIKE '%|' + Name + '|%'
So here's the C# code:
string[] tags = new string[] { "ruby", "rails", "scruffy", "rubyonrails" };
const...
Does Java have something like C#'s ref and out keywords?
...
No, Java doesn't have something like C#'s ref and out keywords for passing by reference.
You can only pass by value in Java. Even references are passed by value. See Jon Skeet's page about parameter passing in Java for more details.
To do something similar to ref or ou...
What is the difference between C, C99, ANSI C and GNU C?
I have started programming practice on codechef and have been confused by the difference between C and C99. What does C mean here? Is it C89? Check the languages at the bottom of this submit . It contains both C and C99.
...