大约有 47,000 项符合查询结果（耗时：0.0575秒） [XML]
Add timestamps to an existing table
...ns, default: DateTime.now
change_column_default :campaigns, :created_at, from: DateTime.now, to: nil
change_column_default :campaigns, :updated_at, from: DateTime.now, to: nil
end
share
|
impro...
Multiple simultaneous downloads using Wget?
...
@Stephen this is to download very large files much faster from websites by using multiple sockets to the server instead of one. This is not mean for scraping a website.
– gabeio
Feb 4 '15 at 22:10
...
Count rows with not empty value
...that includes formulae that result in "", then you can modify your formula from
=counta(range)
to:
=Counta(range) - Countblank(range)
EDIT: the function is countblank, not countblanks, the latter will give an error.
sh...
YouTube API to fetch all videos on a channel
...requests yourself. Here is an example URL that retrieves the latest videos from a channel:
https://www.googleapis.com/youtube/v3/search?key={your_key_here}&channelId={channel_id_here}&part=snippet,id&order=date&maxResults=20
After that you will receive a JSON with video ids and de...
What does “@private” mean in Objective-C?
...vate means that the ivar (instance variable) can only be accessed directly from within an instance of that same class. However, that may not mean much to you, so let me give you an example. We'll use the init methods of the classes as examples, for simplicity's sake. I'll comment inline to point ...
JAX-RS — How to return JSON and HTTP status code together?
...ode ready and working that returns JSON when the HTTP GET method is called from the client. Essentially:
14 Answers
...
Is ASCII code 7-bit or 8-bit?
...SCII-compatible means that regardless of context, single bytes with values from 0x00 through 0x7F encode the same characters that they would in ASCII. You don't want to have anything to do with a non-ASCII-compatible text encoding if you can possibly avoid it; naive programs expecting ASCII tend to...
Can you change a path without reloading the controller in AngularJS?
It's been asked before, and from the answers it doesn't look good. I'd like to ask with this sample code in consideration...
...
C++: Rounding up to the nearest multiple of a number
... + multiple - 1) / multiple) * multiple;
}
This works like rounding away from zero for negative numbers
EDIT: Version that works also for negative numbers
int roundUp(int numToRound, int multiple)
{
assert(multiple);
int isPositive = (int)(numToRound >= 0);
return ((numToRound + ...
android: move a view on touch move (ACTION_MOVE)
... Its working fine but Is there any way to restrict the move from outside the screen that means should move only inside screen boundary..
– Daud Arfin
Oct 19 '13 at 4:34
...