大约有 30,000 项符合查询结果（耗时：0.0378秒） [XML]
How can you use optional parameters in C#?
Note: This question was asked at a time when C# did not yet support optional parameters (i.e. before C# 4).
23 Answers
...
Reshaping data.frame from wide to long format
...,
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
share
|
improve this answer
|
follow
|...
How do Python functions handle the types of the parameters that you pass in?
... name in Python can perfectly well refer to different objects at different times (as in most programming languages, though not all) -- and there is no constraint on the name such that, if it has once referred to an object of type X, it's then forevermore constrained to refer only to other objects of...
How should I use try-with-resources with JDBC?
...(1, userid);
return s;
} catch (SQLException e) { throw new RuntimeException(e); }
}).get();
ResultSet resultSet = stmt.executeQuery()) {
}
share
|
improve this answer
...
See “real” commit date in github (hour/day)
...
Hover your mouse over the 2 years ago and you'll get the timestamp.
share
|
improve this answer
|
follow
|
...
Client-server synchronization pattern / algorithm?
... copy from master to detail, deltas and performance be damned. It's a one-time thing; the client is broken; don't try to optimize this, just implement a reliable copy.
Client is suspicious. In this case, you need to compare client against server to determine if the client is up-to-date and needs a...
Python unittest - opposite of assertRaises?
... to add an assertNotRaises method to unittest.TestCase (it took me about 4 times as long to write this answer as it did the code). Here's a live demo of the assertNotRaises method in action. Just like assertRaises, you can either pass a callable and args to assertNotRaises, or you can use it in a wi...
socket.error: [Errno 48] Address already in use
...et.SO_REUSEADDR, 1)
This should make the port available within a shorter time. In my case, it made the port available almost immediately.
How do I get a string format of the current date time, in python?
...
You can use the datetime module for working with dates and times in Python. The strftime method allows you to produce string representation of dates and times with a format you specify.
>>> import datetime
>>> datetime.date.t...
Possible reasons for timeout when trying to access EC2 instance
I cannot SSH into my instance - Operation timed out. What could be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst
...