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Hidden Features of Java
...e per-thread state.
Since JDK 1.5 Java has had extremely well implemented and robust concurrency tools beyond just locks, they live in java.util.concurrent and a specifically interesting example is the java.util.concurrent.atomic subpackage that contains thread-safe primitives that implement the co...
How to redirect both stdout and stderr to a file [duplicate]
...running a bash script that creates a log file for the execution of the command
5 Answers
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Python (and Python C API): __new__ versus __init__
...stion I'm about to ask seems to be a duplicate of Python's use of __new__ and __init__? , but regardless, it's still unclear to me exactly what the practical difference between __new__ and __init__ is.
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Spring Data: “delete by” is supported?
...ing JPA for database access. I am able to find examples such as findByName and countByName, for which I dont have to write any method implementation. I am hoping to find examples for delete a group of records based on some condition.
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JavaScript - onClick to get the ID of the clicked button
...l reference exception using JQuery's event.target.id (for me, both Firefox and IE were throwing it), this is a great solution that works in all three major browsers.
– X3074861X
Aug 8 '13 at 16:30
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How can I increment a char?
I'm new to Python, coming from Java and C. How can I increment a char? In Java or C, chars and ints are practically interchangeable, and in certain loops, it's very useful to me to be able to do increment chars, and index arrays by chars.
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multiprocessing: sharing a large read-only object between processes?
...ng share objects created earlier in the program?"
No (python before 3.8), and Yes in 3.8 (https://docs.python.org/3/library/multiprocessing.shared_memory.html#module-multiprocessing.shared_memory)
Processes have independent memory space.
Solution 1
To make best use of a large structure with lots...
How can I prevent Visual Studio 2013 from closing my IIS Express app when I end debugging?
Previously in 2012, if I debugged in Chrome (for example), and then stopped the debugger, the website would remain running in IIS Express. This no longer seems to be the case in 2013.
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Generating CSV file for Excel, how to have a newline inside a value
...ot strip off leading spaces. You will get unwanted spaces in your headings and data fields. Worse, the " that should be "protecting" that line-break in the third column will be ignored because it is not at the start of the field.
If you have non-ASCII characters (encoded in UTF-8) in the file, you ...
must appear in the GROUP BY clause or be used in an aggregate function
...
To workaround this issue, you must calculate the aggregate in a sub-query and then join it with itself to get the additional columns you'd need to show:
SELECT m.cname, m.wmname, t.mx
FROM (
SELECT cname, MAX(avg) AS mx
FROM makerar
GROUP BY cname
) t JOIN makerar m ON m.cname = t....