大约有 24,000 项符合查询结果（耗时：0.0493秒） [XML]
Most pythonic way to delete a file which may not exist
...normal behavior in python. For example, iterators must raise exceptions in order to stop iterating.
– Matt
May 31 '12 at 21:37
5
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How to convert image to byte array
...ollows:
public static byte[] converterDemo(Image x)
{
ImageConverter _imageConverter = new ImageConverter();
byte[] xByte = (byte[])_imageConverter.ConvertTo(x, typeof(byte[]));
return xByte;
}
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Ruby on Rails: Delete multiple hash keys
...port adds to Hash.
It would allow your code to be simplified to:
redirect_to my_path(params.except(:controller, :action, :other_key))
Also, you wouldn't have to monkey patch, since the Rails team did it for you!
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Where does Chrome store extensions?
...e\Chrome\User Data\Default then my storage directory is:
C:\Users\<Your_User_Name>\AppData\Local\Google\Chrome\User Data\Default\Extensions
Linux
~/.config/google-chrome/Default/Extensions/
MacOS
~/Library/Application\ Support/Google/Chrome/Default/Extensions
Chromium
~/.config/chro...
Best TCP port number range for internal applications [closed]
...TCP port. What would be the best IANA port range to use for these apps in order to avoid port number collisions with any other process on the server?
...
DataTrigger where value is NOT null?
...neric and use ConverterParameter to pass in a value to compare against (in order to support both comparing to NOT null and NOT 3.
– J c
Dec 10 '08 at 16:56
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How to get the currently logged in user's user id in Django?
...iddleware and AuthenticationMiddleware middlewares added to your MIDDLEWARE_CLASSES setting.
The current user is in request object, you can get it by:
def sample_view(request):
current_user = request.user
print current_user.id
request.user will give you a User object representing the cu...
What is the difference between UNION and UNION ALL?
...
UNION removes duplicates, whereas UNION ALL does not.
In order to remove duplicates the result set must be sorted, and this may have an impact on the performance of the UNION, depending on the volume of data being sorted, and the settings of various RDBMS parameters ( For Oracle PG...
How to change height of grouped UITableView header?
...
Return CGFLOAT_MIN instead of 0 for your desired section height.
Returning 0 causes UITableView to use a default value. This is
undocumented behavior. If you return a very small number, you
effectively get a zero-height header.
S...
How to recursively find the latest modified file in a directory?
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If order matters, you can switch use sort -rn | head -3 instead of sort -n | tail -3. One version gives the files from oldest to newest, while the other goes from newest to oldest.
– Don Faulkner
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