大约有 44,000 项符合查询结果（耗时：0.0336秒） [XML]
What does ^M character mean in Vim?
I keep getting ^M character in my vimrc and it breaks my configuration.
15 Answers
...
Postgresql aggregate array
...
What I understand you can do something like this:
SELECT p.p_name,
STRING_AGG(Grade.Mark, ',' ORDER BY Grade.Mark) As marks
FROM Student
LEFT JOIN Grade ON Grade.Student_id = Student.Id
GROUP BY Student.Name;
EDIT
I am not sure. B...
Pass correct “this” context to setTimeout callback?
...'t suggested in the original answer because it wasn't yet widely supported and you needed polyfills to use it but now it's everywhere:
if (this.options.destroyOnHide) {
setTimeout(function(){ this.tip.destroy() }.bind(this), 1000);
}
The bind function creates a new function with the this val...
Can someone explain __all__ in Python?
I have been using Python more and more, and I keep seeing the variable __all__ set in different __init__.py files. Can someone explain what this does?
...
git ignore vim temporary files
...le .gitignore the line
*~
Vim also creates swap files that have the swp and swo extensions. to remove those use the lines:
*.swp
*.swo
This will ignore all the vim temporary files in a single project
If you want to do it globally, you can create a .gitignore file in your home (you can give it...
How to prune local tracking branches that do not exist on remote anymore
...es.
This line should do the trick (requires bash or zsh, won't work with standard Bourne shell):
git branch -r | awk '{print $1}' | egrep -v -f /dev/fd/0 <(git branch -vv | grep origin) | awk '{print $1}' | xargs git branch -d
This string gets the list of remote branches and passes it into egrep...
Strip Leading and Trailing Spaces From Java String
...
what all does it replace? Spaces and newlines maybe ?
– Someone Somewhere
Sep 9 '14 at 22:19
...
How do I use pagination with Django class based generic ListViews?
...ListView
class CarListView(ListView):
model = models.Car # shorthand for setting queryset = models.Car.objects.all()
template_name = 'app/car_list.html' # optional (the default is app_name/modelNameInLowerCase_list.html; which will look into your templates folder for that path and fil...
A cron job for rails: best practices?
...Listener.process_new_messages
puts "done."
end
To execute from the command line, this is just "rake cron". This command can then be put on the operating system cron/task scheduler as desired.
Update this is quite an old question and answer! Some new info:
the heroku cron service I referenced ...
SQL Server - copy stored procedures from one db to another
I am new to SQL, and what I needed to do was to combine 2 .mdf databases into one. I did that using SQL Server 2008 Manager - Tasks > Import/Export tables.The tables and views were copied successfully, but there are no Stored procedures in the new database. Is there any way to do that?
...