大约有 47,000 项符合查询结果（耗时：0.1001秒） [XML]
Mixin vs inheritance
...riety of parent classes. Mixins may call a method (for example sayHello(): String) even though they do not define such a method.
mixin M {
name: String
defmethod greetings() { print sayHello() + " " + name}
}
As you see, you can call sayHello() even though it is not defined anywhere. If ...
Plotting time in Python with Matplotlib
...ar is set to 1990": Could you please post the code you use to convert from string to datetime? Something might be wrong with the conversion. Re. the formatting of chart labels, see the date_demo1 link provided by J. K. Seppänen. The matplot lib documentation is excellent, BTW. matplotlib.sourceforg...
How to exit from the application and show the home screen?
...tent as
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
also, add some extra like boolean to the intent
intent.putExtra("EXIT", true);
Then in root activity, check the value of the boolean and according to that call finish(), in the onCreate() of the root activity
if (getIntent().getBooleanE...
Computed / calculated / virtual / derived columns in PostgreSQL
...l, but makes makes life a bit easier).
Suppose my computation is md5(some_string_field), then I create the index as:
CREATE INDEX some_string_field_md5_index ON some_table(MD5(some_string_field));
Now, any queries that act on MD5(some_string_field) will use the index rather than computing it fr...
Is there a good jQuery Drag-and-drop file upload plugin? [closed]
...desktop drag+drop plugin out there that I know of which allows you to send extra data along with the file, including data that can be calculated at the time of upload with a callback function.
share
|
...
Fatal error: Maximum execution time of 30 seconds exceeded
..., to keep this limit as low as possible while allowing a certain amount of extra buffer. Out of security reasons I would not want to turn it off completely. It should be set reasonable. I actually set it to twice the amount of time my longest running script takes for completion under a medium server...
Open a file with su/sudo inside Emacs
...hat subsequent sudo-opened files take much less time.
I haven't found the extra time it takes to save burdening, either. It's fast enough, IMO.
share
|
improve this answer
|
...
What is a “cache-friendly” code?
...reases the number from 2 to N+1. Organizing a cache into more "ways" takes extra circuitry and generally runs slower, so (for example) an 8192-way set associative cache is rarely a good solution either.
Ultimately, this factor is more difficult to control in portable code though. Your control over w...
Class method decorator with self arguments?
...t reads the attribute off of that. You can pass in the attribute name as a string to the decorator and use getattr if you don't want to hardcode the attribute name:
def check_authorization(attribute):
def _check_authorization(f):
def wrapper(self, *args):
print getattr(self,...
Regular Expression to match only alphabetic characters
I was wondering If I could get a regular expression which will match a string that only has alphabetic characters, and that alone.
...