大约有 47,000 项符合查询结果（耗时：0.0755秒） [XML]
PostgreSQL LIKE query performance variations
...k), it just won't buy you better performance. Typically no big loss, since 1- or 2-letter strings are hardly selective (more than a few percent of the underlying table matches) and index support would not improve performance to begin with, because a full table scan is faster.
text_pattern_ops for...
UIViewController viewDidLoad vs. viewWillAppear: What is the proper division of labor?
...
251
viewDidLoad is things you have to do once. viewWillAppear gets called every time the view appear...
Check image width and height before upload with Javascript
...;
img.src = objectUrl;
}
});
Demo: http://jsfiddle.net/4N6D9/1/
I take it you realize this is only supported in a few browsers. Mostly firefox and chrome, could be opera as well by now.
P.S. The URL.createObjectURL() method has been removed from the MediaStream interface. This method...
What is uint_fast32_t and why should it be used instead of the regular int and uint32_t?
...
135
int may be as small as 16 bits on some platforms. It may not be sufficient for your applicati...
Max parallel http connections in a browser?
...a given domain simultaneously. So if a user is looking at my website in Tab1 of their browser, then also tries loading it in Tab2, they've used up the two allowed connections to my site.
...
How can I negate the return-value of a process?
...
104
Previously, the answer was presented with what's now the first section as the last section.
P...
Scala 2.8 breakOut
...e the best builder possible. For example, if I were to write Map('a' -> 1).map(_.swap), I'd like to get a Map(1 -> 'a') back. On the other hand, a Map('a' -> 1).map(_._1) can't return a Map (it returns an Iterable).
The magic of producing the best possible Builder from the known types of t...
Unbalanced calls to begin/end appearance transitions for
...
|
edited Oct 28 '19 at 10:43
answered Oct 25 '11 at 8:03
...