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background:none vs background:transparent what is the difference?
...fy a value for any of the half-dozen properties that background is a shorthand for, then it is set to its default value. none and transparent are the defaults.
One explicitly sets the background-image to none and implicitly sets the background-color to transparent. The other is the other way around...
What do helper and helper_method do?
... This is used for any method that you need to access from both controllers and helpers/views (standard helper methods are not available in controllers). e.g. common use case:
#application_controller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
end
helper_method :curre...
.aspx vs .ashx MAIN difference
What are the differences between .aspx and .ashx pages?
I use ashx now when I need to handle a request that was called from code and returned with a response, but I would like a more technical answer please.
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How do you specify command line arguments in Xcode 4?
I just upgraded to Xcode 4 and can't find much documentation on it yet, since it just went gold master. I need to specify a command line argument for testing my application.
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MySQL/SQL: Group by date only on a Datetime column
...able GROUP BY DATE(a_table.mydate);
Or you can GROUP BY the alias as @orlandu63 suggested:
SELECT SUM(foo), DATE(mydate) DateOnly FROM a_table GROUP BY DateOnly;
Though I don't think it'll make any difference to performance, it is a little clearer.
...
How to translate between Windows and IANA time zones?
...
The primary source of the data for conversion between Windows and IANA time zone identifiers is the windowsZones.xml file, distributed as part of the Unicode CLDR project. The latest dev version can be found here.
However, CLDR is released only twice annually. This, along with the per...
What is Java Servlet?
I read many articles to understand java servlet but I did not succeed.
12 Answers
12
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Hide console window from Process.Start C#
...eate a process. But the problem is, creating a service is take a long time and console window is displayed.
Another annoying thing is the console window is displayed on top of my windows form and i cant do any other operations on that form.
I have set all properties like CreateNoWindow = true ,
...
Dynamic SQL - EXEC(@SQL) versus EXEC SP_EXECUTESQL(@SQL)
What are the real world pros and cons of executing a dynamic SQL command in a stored procedure in SQL Server using
5 Answer...
Using Vim's persistent undo?
...
Put this in your .vimrc to create an undodir if it doesn't exist and enable persistent undo. Tested on both Windows and Linux.
" Put plugins and dictionaries in this dir (also on Windows)
let vimDir = '$HOME/.vim'
let &runtimepath.=','.vimDir
" Keep undo history across sessions by st...