大约有 36,010 项符合查询结果（耗时：0.0525秒） [XML]
Is it possible to read from a InputStream with a timeout?
...- it always returns the best value for the number of bytes available. Javadoc for InputStream.available():
Returns an estimate of the number of bytes that can be read (or skipped over)
from this input stream without blocking by the next invocation of a method for
this input stream.
An estimate...
Why use double indirection? or Why use pointers to pointers?
When should a double indirection be used in C? Can anyone explain with a example?
18 Answers
...
mongodb: insert if not exists
Every day, I receive a stock of documents (an update). What I want to do is insert each item that does not already exist.
8...
Getting a timestamp for today at midnight?
... think that you should use the new PHP DateTime object as it has no issues doing dates beyond the 32 bit restrictions that strtotime() has. Here's an example of how you would get today's date at midnight.
$today = new DateTime();
$today->setTime(0,0);
Or if you're using PHP 5.4 or later you c...
Using XPATH to search text containing
...behavior, so you can
ignore all the tabs and newlines in
your HTML and do assertions based on
how the text looks in the browser when
rendered. We do this by replacing all
non-visible whitespace (including the
non-breaking space " ") with a
single space. All visible newlines
...
How do I escape ampersands in XML so they are rendered as entities in HTML?
I have some XML text that I wish to render in an HTML page. This text contains an ampersand, which I want to render in its entity representation: & .
...
'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...are logically True. This facilitates the common use case where you want to do something if a list is empty and something else if the list is not. Note that this means that the list [False] is logically True:
>>> if [False]:
... print 'True'
...
True
So in Example 1, the first list is ...
Throttling method calls to M requests in N seconds
... execution of some method to maximum M calls in N seconds (or ms or nanos, does not matter).
14 Answers
...
HTTP GET Request in Node.js Express
...rom a sample of mine. It's asynchronous and returns a JSON object. It can do any form of GET request.
Note that there are more optimal ways (just a sample) - for example, instead of concatenating the chunks you put into an array and join it etc... Hopefully, it gets you started in the right direct...
how do you filter pandas dataframes by multiple columns
...
Using & operator, don't forget to wrap the sub-statements with ():
males = df[(df[Gender]=='Male') & (df[Year]==2014)]
To store your dataframes in a dict using a for loop:
from collections import defaultdict
dic={}
for g in ['male', 'f...