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Java List.add() UnsupportedOperationException
...table or only allow some selected changes.
You can find out about this by reading the documentation of UnsupportedOperationException and List.add(), which documents this to be an "(optional operation)". The precise meaning of this phrase is explained at the top of the List documentation.
As a work...
Unix command to find lines common in two files
...equivalent:
awk 'NR==FNR{arr[$0];next} $0 in arr' file1 file2
This will read all lines from file1 into the array arr[], and then check for each line in file2 if it already exists within the array (i.e. file1). The lines that are found will be printed in the order in which they appear in file2.
No...
Natural Sort Order in C#
...
This is both beautiful and impossible to read. I assume that the benefits of Linq will mean (at least) best average and best-case performance, so I think I'm going to go with it. Despite the lack of clarity. Thanks very much @Matthew Horsley
– ...
OS detecting makefile
...
There are many good answers here already, but I wanted to share a more complete example that both:
doesn't assume uname exists on Windows
also detects the processor
The CCFLAGS defined here aren't necessarily recommended or ideal; they're just what the pr...
How to get string objects instead of Unicode from JSON?
...urn dictionary of byteified keys and values
# but only if we haven't already byteified it
if isinstance(data, dict) and not ignore_dicts:
return {
_byteify(key, ignore_dicts=True): _byteify(value, ignore_dicts=True)
for key, value in data.iteritems()
}...
What is the __del__ method, How to call it?
I am reading a code. There is a class in which __del__ method is defined. I figured out that this method is used to destroy an instance of the class. However, I cannot find a place where this method is used. The main reason for that is that I do not know how this method is used, probably not like ...
Sending files using POST with HttpURLConnection
...new
BufferedInputStream(httpUrlConnection.getInputStream());
BufferedReader responseStreamReader =
new BufferedReader(new InputStreamReader(responseStream));
String line = "";
StringBuilder stringBuilder = new StringBuilder();
while ((line = responseStreamReader.readLine()) != null) {
...
Correct Bash and shell script variable capitalization
...ut now that you mention it, I think I decided on using lowercase because I read or heard about just that problem.
– JasonSmith
Mar 23 '09 at 16:23
5
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Spring MVC: How to perform validation?
...he "name" attribute, with annotations (it is quick to do, concise and more readable). Keep the heavy validations for validators (when it would take hours to code custom complex validation annotations, or just when it is not possible to use annotations). I did this on a former project, it worked like...
How to remove/ignore :hover css style on touch devices
...e.net/57tmy8j3/
If you're interested why or what other options there are, read on.
Quick'n'dirty - remove :hover styles using JS
You can remove all the CSS rules containing :hover using Javascript. This has the advantage of not having to touch CSS and being compatible even with older browsers.
f...