大约有 41,000 项符合查询结果（耗时：0.0750秒） [XML]
Rails: Missing host to link to! Please provide :host parameter or set default_url_options[:host]
I have been googling for about 90 minutes now and still don't have an answer to this. Where do I set default_url_options ? I've already set it for config.action_mailer.default_url_options to solve this same bug elsewhere, but now I'm getting this error when trying to use a URL helper inside an ...
How to use 'cp' command to exclude a specific directory?
I want to copy all files in a directory except some files in a specific sub-directory.
I have noticed that cp command didn't have the --exclude option.
So, how can I achieve this?
...
What happens if you don't commit a transaction to a database (say, SQL Server)?
...
As long as you don't COMMIT or ROLLBACK a transaction, it's still "running" and potentially holding locks.
If your client (application or user) closes the connection to the database before committing, any still running transactions will be rolled back...
AngularJS and its use of Dollar Variables
...cross $scope.$value and $scope.value , then it will avoid checking the former since it's prefixed with a dollar character in its variable name?
...
keep rsync from removing unfinished source files
...
It seems to me the problem is transferring a file before it's complete, not that you're deleting it.
If this is Linux, it's possible for a file to be open by process A and process B can unlink the file. There's no error, but of course A is wasting its time. Therefore, the fa...
What is “Power Save Mode” in IntelliJ IDEA and other Jetbrains IDEs?
...earch results that answer this question. What is it, and what is it used for?
2 Answers
...
What is a 'multi-part identifier' and why can't it be bound?
I continually get these errors when I try to update tables based on another table. I end up rewriting the query, change the order of joins, change some groupings and then it eventually works, but I just don't quite get it.
...
How to get the Power of some Integer in Swift language?
...
If you like, you could declare an infix operator to do it.
// Put this at file level anywhere in your project
infix operator ^^ { associativity left precedence 160 }
func ^^ (radix: Int, power: Int) -> Int {
return Int(pow(Double(radix), Double(power)))
}
// ......
How to append multiple values to a list in Python
... I know there are few methods to do so, such as manually input the values, or put the append operation in a for loop, or the append and extend functions.
...
Retaining file permissions with Git
I want to version control my web server as described in Version control for my web server , by creating a git repo out of my /var/www directory . My hope was that I would then be able to push web content from our dev server to github, pull it to our production server, and spend the rest of the d...