大约有 45,499 项符合查询结果（耗时：0.0424秒） [XML]
Find (and kill) process locking port 3000 on Mac
...
You can try netstat
netstat -vanp tcp | grep 3000
For macOS El Capitan and newer (or if your netstat doesn't support -p), use lsof
sudo lsof -i tcp:3000
For Centos 7 use
netstat -vanp --tcp | grep 3000
share
...
How can I add a boolean value to a NSDictionary?
...
You use NSNumber.
It has init... and number... methods that take booleans, just as it does integers and so on.
From the NSNumber class reference:
// Creates and returns an NSNumber object containing a
// given value, treating it as a BOOL.
...
Grouped LIMIT in PostgreSQL: show the first N rows for each group?
... (PostgreSQL 8.4)
SELECT
*
FROM (
SELECT
ROW_NUMBER() OVER (PARTITION BY section_id ORDER BY name) AS r,
t.*
FROM
xxx t) x
WHERE
x.r <= 2;
share
|
improve this answer
...
How to build sources jar with gradle
I am working with an open source project that is built with gradle. I would like to generate a (project)-sources.jar file that I can load into my IDE (IntelliJ IDEA) and debug through the project. I know how to load the file if I can generate it.
...
Creating a UICollectionView programmatically
...viewDidLoad
{
[super viewDidLoad];
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
_collectionView=[[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout...
Java regex email
...rn.compile("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$", Pattern.CASE_INSENSITIVE);
public static boolean validate(String emailStr) {
Matcher matcher = VALID_EMAIL_ADDRESS_REGEX.matcher(emailStr);
return matcher.find();
}
Works fairly reliably.
...
Output array to CSV in Ruby
It's easy enough to read a CSV file into an array with Ruby but I can't find any good documentation on how to write an array into a CSV file. Can anyone tell me how to do this?
...
Animate the transition between fragments
I'm trying to animate the transition between fragments. I got the answer from the following
Android Fragments and animation
...
T-SQL Cast versus Convert
...much the same. If you don't care about the extended features, use CAST.
EDIT:
As noted by @beruic and @C-F in the comments below, there is possible loss of precision when an implicit conversion is used (that is one where you use neither CAST nor CONVERT). For further information, see CAST and CONV...
Why do we have map, fmap and liftM?
... You might ask why we need a separate map function. Why not just do away with the current
list-only map function, and rename fmap to map instead? Well, that’s a good question. The
usual argument is that someone just learning Haskell, when using map incorrectly, would much
rather see an erro...