大约有 43,076 项符合查询结果（耗时：0.0410秒） [XML]
phantomjs not waiting for “full” page load
I'm using PhantomJS v1.4.1 to load some web pages. I don't have access to their server-side, I just getting links pointing to them. I'm using obsolete version of Phantom because I need to support Adobe Flash on that web pages.
...
Make outer div be automatically the same height as its floating content
...
169
You can set the outerdiv's CSS to this
#outerdiv {
overflow: hidden; /* make sure this do...
How do shift operators work in Java? [duplicate]
...
214
System.out.println(Integer.toBinaryString(2 << 11));
Shifts binary 2(10) by 11 times t...
Counting null and non-null values in a single query
... to get it to work on another RDBMS):
select sum(case when a is null then 1 else 0 end) count_nulls
, count(a) count_not_nulls
from us;
Or:
select count(*) - count(a), count(a) from us;
share
|
...
Can't pickle when using multiprocessing Pool.map()
...
12 Answers
12
Active
...
How to use shared memory with Linux in C
...
166
There are two approaches: shmget and mmap. I'll talk about mmap, since it's more modern and fl...
PHP: How to send HTTP response code?
...TP response line and lets you replace that with a custom one
header("HTTP/1.1 200 OK");
However, this requires special treatment for (Fast)CGI PHP:
$sapi_type = php_sapi_name();
if (substr($sapi_type, 0, 3) == 'cgi')
header("Status: 404 Not Found");
else
header("HTTP/1.1 404 Not Found");...
Find rows that have the same value on a column in MySQL
...SELECT email,
count(*) AS c
FROM TABLE
GROUP BY email
HAVING c > 1
ORDER BY c DESC
If you want the full rows:
select * from table where email in (
select email from table
group by email having count(*) > 1
)
...
EC2 Can't resize volume after increasing size
...
14 Answers
14
Active
...