大约有 34,900 项符合查询结果(耗时:0.0536秒) [XML]

https://stackoverflow.com/ques... 

How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?

...f you want zeros instead of not selecting, then a CASE statement should work: SELECT CASE WHEN myfield~E'^\\d+$' THEN myfield::integer ELSE 0 END FROM mytable; share | improve this answer ...
https://stackoverflow.com/ques... 

Does Python have a package/module management system?

Does Python have a package/module management system, similar to how Ruby has rubygems where you can do gem install packagename ? ...
https://stackoverflow.com/ques... 

Simplest way to profile a PHP script

... edited Oct 16 '18 at 21:59 YakovL 4,8141010 gold badges4242 silver badges6060 bronze badges answered Aug 21 '08 at 21:04 ...
https://stackoverflow.com/ques... 

How can I use jQuery in Greasemonkey scripts in Google Chrome?

As some of you may know, Google Chrome has put some severe limitation on Greasemonkey scripts. 11 Answers ...
https://stackoverflow.com/ques... 

Multiple contexts with the same path error running web service in Eclipse using Tomcat

...I wrote the class, I created the web service with Apache Axis2. When I click the start server button in eclipse it gives an error message: ...
https://stackoverflow.com/ques... 

Can I target all tags with a single selector?

I'd like to target all h tags on a page. I know you can do it this way... 10 Answers 1...
https://stackoverflow.com/ques... 

MySQL: determine which database is selected?

...cted? This seems very basic but I couldn't find anything on php.net or stackoverflow (all results are for "no database selected"). ...
https://stackoverflow.com/ques... 

How to retrieve a single file from a specific revision in Git?

I have a Git repository and I'd like to see how some files looked a few months ago. I found the revision at that date; it's 27cf8e84bb88e24ae4b4b3df2b77aab91a3735d8 . I need to see what one file looks like, and also save it as a ("new") file. ...
https://stackoverflow.com/ques... 

How do I get the time difference between two DateTime objects using C#?

...ited May 28 '14 at 12:32 Amol M Kulkarni 18k3030 gold badges107107 silver badges156156 bronze badges answered May 12 '10 at 17:08 ...
https://stackoverflow.com/ques... 

Easy idiomatic way to define Ordering for a simple case class

... My personal favorite method is to make use of the provided implicit ordering for Tuples, as it is clear, concise, and correct: case class A(tag: String, load: Int) extends Ordered[A] { // Required as of Scala 2.11 for reasons unknown - the companion to Order...