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Real differences between “java -server” and “java -client”?
...ned for server applications. These two solutions share the Java HotSpot runtime environment code base, but use different compilers that are suited to the distinctly unique performance characteristics of clients and servers. These differences include the compilation inlining policy and heap defaults....
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
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How do I know if a generator is empty from the start?
...lity only. def next(self): """Return the next message in a one-time iteration.""" if not hasattr(self, '_onetime_keys'): self._onetime_keys = self.iterkeys() while True: try: return self[next(self._onetime_keys)] except ...
Reshaping data.frame from wide to long format
...,
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
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How to use NULL or empty string in SQL
I would like to know how to use NULL and an empty string at the same time in a WHERE clause in SQL Server. I need to find records that have either null values or an empty string. Thanks.
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See “real” commit date in github (hour/day)
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Hover your mouse over the 2 years ago and you'll get the timestamp.
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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 should I use try-with-resources with JDBC?
...(1, userid);
return s;
} catch (SQLException e) { throw new RuntimeException(e); }
}).get();
ResultSet resultSet = stmt.executeQuery()) {
}
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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
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how to convert array values from string to int?
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This is almost 3 times faster than explode(), array_map() and intval():
$integerIDs = json_decode('[' . $string . ']', true);
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