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How costly is .NET reflection?
...lay or problem with it. It's a very powerful mechanism and it is even used by .NET, so I don't see why you shouldn't give it a try.
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What does flushing the buffer mean?
...g to a file. This is an expensive operation. If in your code you write one byte at a time, then each write of a byte is going to be very costly. So a common way to improve performance is to store the data that you are writing in a temporary buffer. Only when there is a lot of data is the buffer writ...
How do I get PyLint to recognize numpy members?
...solution worked like a charm: I added numpy to the list of ignored modules by modifying my pylintrc file, in the [TYPECHECK] section:
[TYPECHECK]
ignored-modules = numpy
Depending on the error, you might also need to add the following line (still in the [TYPECHECK] section):
ignored-classes = n...
Cannot kill Python script with Ctrl-C
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you should mention that by doing this threads are not stopped gracefully and some resources not released.
– Tommaso Barbugli
May 20 '13 at 10:21
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Please explain about insertable=false and updatable=false in reference to the JPA @Column annotation
...is not foreign key (as there is no referenced entity to disable updating). By reading javadoc for updatable I would say that it will just disable to change Person for given Address if it is once persisted. Can you explain please?
– Flowy
Oct 3 '16 at 11:49
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e.printStackTrace equivalent in python
...eption("Something awful happened!")
# will print this message followed by traceback
Output:
ERROR 2007-09-18 23:30:19,913 error 1294 Something awful happened!
Traceback (most recent call last):
File "b.py", line 22, in f
g()
File "b.py", line 14, in g
1/0
ZeroDivisionError: intege...
What is thread contention?
...where one thread is waiting for a lock/object that is currently being held by another thread. Therefore, this waiting thread cannot use that object until the other thread has unlocked that particular object.
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How to deploy a war file in Tomcat 7
.../localhost:8080/sample
Deploying or redeploying of war files is automatic by default - after copying/overwriting the file sample.war, check your webapps folder for an extracted folder sample.
If it doesn't open properly, check the log files (e.g. tomcat/logs/catalina.out) for problems with deploym...
IIS7 Cache-Control
...ntent for 7 days in that folder and all subfolders.
You can also do this by editing the IIS7 metabase via appcmd.exe, like so:
\Windows\system32\inetsrv\appcmd.exe
set config "Default Web Site/folder"
-section:system.webServer/staticContent
-clientCache.cacheControlMode:UseMaxAge
\Wind...
Is it necessary to write HEAD, BODY and HTML tags?
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Omitting the html, head, and body tags is certainly allowed by the HTML specs. The underlying reason is that browsers have always sought to be consistent with existing web pages, and the very early versions of HTML didn't define those elements. When HTML 2.0 first did, it was done in ...