大约有 16,410 项符合查询结果（耗时：0.0391秒） [XML]
Rails raw SQL example
...e in rails? Because When I deploy this code in heroku,there is a request timeout error.I think this will be faster if I use raw sql.
...
Determining Whether a Directory is Writeable
What would be the best way in Python to determine whether a directory is writeable for the user executing the script? Since this will likely involve using the os module I should mention I'm running it under a *nix environment.
...
Maximum single-sell profit
...that if we bought the stock on buyDay and sold it on sellDay , we would maximize our profit.
19 Answers
...
Best way to serialize an NSData into a hexadeximal string
I am looking for a nice-cocoa way to serialize an NSData object into a hexadecimal string. The idea is to serialize the deviceToken used for notification before sending it to my server.
...
How do I get the result of a command in a variable in windows?
I'm looking to get the result of a command as a variable in a Windows batch script (see how to get the result of a command in bash for the bash scripting equivalent). A solution that will work in a .bat file is preferred, but other common windows scripting solutions are also welcome.
...
How to show “Done” button on iPhone number pad
There is no "Done" button on the number pad. When a user finishes entering numeric information in a text field, how can I make the number pad disappear?
...
How to run an EXE file in PowerShell with parameters with spaces and quotes
How do you run the following command in PowerShell?
19 Answers
19
...
Is errno thread-safe?
In errno.h , this variable is declared as extern int errno; so my question is, is it safe to check errno value after some calls or use perror() in multi-threaded code. Is this a thread safe variable? If not, then whats the alternative ?
...
Get content uri from file path in android
I know the absolute path of an image (say for eg, /sdcard/cats.jpg). Is there any way to get the content uri for this file ?
...
What is the MySQL VARCHAR max size?
I would like to know what the max size is for a MySQL VARCHAR type.
7 Answers
7
...