大约有 13,071 项符合查询结果（耗时：0.0411秒） [XML]
How to limit UITableView row reordering to a section
I was hitting my head over this one, and google was turning up nothing.
I eventually worked it out and thought I'd write it up here for the sake of the next person.
...
Return 0 if field is null in MySQL
In MySQL, is there a way to set the "total" fields to zero if they are NULL?
5 Answers
...
Proper usage of Java -D command-line parameters
...
I suspect the problem is that you've put the "-D" after the -jar. Try this:
java -Dtest="true" -jar myApplication.jar
From the command line help:
java [-options] -jar jarfile [args...]
In other words, the way you've got it...
SQL query for finding records where count > 1
I have a table named PAYMENT . Within this table I have a user ID, an account number, a ZIP code and a date. I would like to find all records for all users that have more than one payment per day with the same account number.
...
Difference between exit(0) and exit(1) in Python
...
0 and 1 are the exit codes.
exit(0) means a clean exit without any errors / problems
exit(1) means there was some issue / error / problem and that is why the program is exiting.
This is not Python specific and is pretty common. A non-zero exit code is treated as an abnormal exit, an...
How does IPython's magic %paste work?
I want to copy already indented Python code / whole functions and classes into IPython. Everytime I try the indentation is screwed up and I get following error message:
...
Is it a good idea to index datetime field in mysql?
...g a large database. In my application I will have many rows for example I currently have one table with 4 million records. Most of my queries use datetime clause to select data. Is it a good idea to index datetime fields in mysql database?
...
What is the most efficient way to store tags in a database?
...m implementing a tagging system on my website similar to one stackoverflow uses, my question is - what is the most effective way to store tags so that they may be searched and filtered?
...
Hex representation of a color with alpha channel?
...ere a W3 or any other noteworthy standard on how to represent a color (including alpha channel) in hex format?
5 Answers
...
How to download/checkout a project from Google Code in Windows?
...
If you don't want to install anything but do want to download an SVN or GIT repository, then you can use this: http://downloadsvn.codeplex.com/
I have nothing to do with this project, but I just used it now and it saved me a few ...