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How can I hash a password in Java?
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You can actually use a facility built in to the Java runtime to do this. The SunJCE in Java 6 supports PBKDF2, which is a good algorithm to use for password hashing.
byte[] salt = new byte[16];
random.nextBytes(salt);
KeySpec spec = new PBEKeySpec("pas...
How do I add a Maven dependency in Eclipse?
...'t know how to use Maven at all. I've been developing for a couple years with Eclipse and haven't yet needed to know about it. However, now I'm looking at some docs that suggest I do the following:
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How to sort an array of objects by multiple fields?
...ing method, based on this answer:
Update: Here is an "optimized" version. It does a lot more preprocessing and creates a comparison function for each sorting option beforehand. It might need more more memory (as it stores a function for each sorting option, but it should preform a bit better as it ...
Size-limited queue that holds last N elements in Java
... on Java libraries: is there a ready-made class that implements a Queue with a fixed maximum size - i.e. it always allows addition of elements, but it will silently remove head elements to accomodate space for newly added elements.
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How can I close a buffer without closing the window?
Vim's multilayered views (Windows, Buffers and Tabs) left me a little confused. Let's say I split the display (:sp) and then select a different buffer to display in each window. Now I want to close one of the buffers, yet I don't want the window to close (After the closing it can display the next bu...
Git ignore sub folders
.../Release" folders (and their contents), but still include the "bin" folder itself and any dll's contained therein.
10 Answe...
How can I check in a Bash script if my local Git repository has changes?
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What you're doing will almost work: you should quote $CHANGED in case it's empty, and -z tests for empty, which means no changes. What you meant was:
if [ -n "$CHANGED" ]; then
VN="$VN-mod"
fi
A quote from Git's GIT-VERSION-GEN:
git update-index -q --refresh
test -z "$(git diff-index --...
Does SVG support embedding of bitmap images?
Is an SVG image purely vectorial or can we combine bitmap images into an SVG image ?
How about transforms applied on the bitmap images (perspective, mappings, etc.) ?
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How can I use an http proxy with node.js http.Client?
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Tim Macfarlane's answer was close with regards to using a HTTP proxy.
Using a HTTP proxy (for non secure requests) is very simple. You connect to the proxy and make the request normally except that the path part includes the full url and the host header is se...
How to redirect output with subprocess in Python?
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UPDATE: os.system is discouraged, albeit still available in Python 3.
Use os.system:
os.system(my_cmd)
If you really want to use subprocess, here's the solution (mostly lifted from the documentation for subprocess):
p = subprocess.Popen(my_cmd, shell=True)...