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In a django model custom save() method, how should you identify a new object?
...exes on other fields). In that case, you could still have a new record in hand, but be unable to save it.
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Nginx 403 forbidden for all files
.../demo, etc. for www-data x access. My guess is that /home is probably 770 and www-data can't chdir through it to get to any subdir. If it is, try chmod o+x /home (or whatever dir is denying the request).
EDIT: To easily display all the permissions on a path, you can use namei -om /path/to/check
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How can you list the matches of Vim's search?
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" put in your ~/.vimrc file
" START search related configs and helps
"
" ignore case when searching
set ignorecase
" search as characters are entered, as you type in more characters, the search is refined
set incsearch
" highlight matches, in normal mode try...
Sending files using POST with HttpURLConnection
Since the Android developers recommend to use the HttpURLConnection class, I was wondering if anyone can provide me with a good example on how to send a bitmap "file" (actually an in-memory stream) via POST to an Apache HTTP server. I'm not interested in cookies or authentication or anything com...
Removing all non-numeric characters from string in Python
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and that could be: from re import sub
– James Koss
May 6 '19 at 21:34
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Does have to be in the of an HTML document?
... style tags need to be inside the head of an HTML document? The 4.01 standard implies that, but it's not explicitly stated:
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Calculate size of Object in Java [duplicate]
... an object takes up for a project (I'm comparing sizes of data structures) and it seems like there is no method to do this in Java. Supposedly, C/C++ has sizeOf() method, but this is nonexistant in Java. I tried recording the free memory in the JVM with Runtime.getRuntime().freeMemory() before a...
Find nearest value in numpy array
... idx = (np.abs(array - value)).argmin()
return array[idx]
array = np.random.random(10)
print(array)
# [ 0.21069679 0.61290182 0.63425412 0.84635244 0.91599191 0.00213826
# 0.17104965 0.56874386 0.57319379 0.28719469]
value = 0.5
print(find_nearest(array, value))
# 0.568743859261
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C# 能否获取一个对象所占内存的大小？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
... way we lay these things out. For example, on some systems we might align and pack differently. For this to happen, you need to specify tdAutoLayout for the layout mask of your ValueType or Class. If you specify tdExplicitLayout or tdSequentialLayout, the CLR’s freedom to optimize your layo...
What does PermGen actually stand for?
...n specific.
Briefly, it contains the Java objects associated with classes and interned strings. In Sun's client implementation with sharing on, classes.jsa is memory mapped to form the initial data, with about half read-only and half copy-on-write.
Java objects that are merely old are kept in the ...