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Git: how to reverse-merge a commit?
...it show <merge commit SHA1> to see the parents, the numbering is the order they appear e.g. Merge: e4c54b3 4725ad2
git merge documentation:
http://schacon.github.com/git/git-merge.html
git merge discussion (confusing but very detailed):
http://schacon.github.com/git/howto/revert-a-faulty-me...
Avoid synchronized(this) in Java?
...angerous. You've now introduced a client-side (user's of this class) lock ordering requirement. If two threads are calling method1() and method2() in a different order, they are likely to deadlock, but the user of this class has no idea that this is the case.
– daveb
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Difference between Arrays.asList(array) and new ArrayList(Arrays.asList(array))
...l, if you overwrite an element, it gets overwritten in the original array, etc. Of course, some List operations aren't allowed on the wrapper, like adding or removing elements from the list, you can only read or overwrite the elements.
Note that the list wrapper doesn't extend ArrayList - it's a di...
Suppress warning messages using mysql from within Terminal, but password written in bash script
... based distro, and running as root, you could skip the above and just use /etc/mysql/debian.cnf to get in ... :
mysql --defaults-extra-file=/etc/mysql/debian.cnf
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Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
...tp://d36cz9buwru1tt.cloudfront.net/AWS_NoSQL_MongoDB.pdf
Mongodb path in /etc/mongodb.conf was set to /var/lib/mongodb (primary install location and working). When I changed to /data/db (EBS volume) I was getting 'errno:13 Permission denied'.
First I ran sudo service mongodb stop.
Then I used ls ...
Where in memory are my variables stored in C?
...for storing the frequently executed code (binary data), program variables, etc. The below memory segments talks about the same:
Typically there are three types of variables:
Local variables (also called as automatic variables in C)
Global variables
Static variables
You can have global static or lo...
OS X Terminal Colors [closed]
...e (since OS X 10.8) — or (for 10.7 and earlier): .profile or .bashrc or /etc/profile (depending on availability) — in your home directory and add following code:
export CLICOLOR=1
export LSCOLORS=GxFxCxDxBxegedabagaced
CLICOLOR=1 simply enables coloring of your terminal.
LSCOLORS=... specifi...
What is q=0.5 in Accept* HTTP headers?
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Very nice, thanks! But why not just list them in the order of preference?
– kolypto
Dec 18 '11 at 16:12
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Why do I have to access template base class members through the this pointer?
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Short answer: in order to make x a dependent name, so that lookup is deferred until the template parameter is known.
Long answer: when a compiler sees a template, it is supposed to perform certain checks immediately, without seeing the templ...
What's the difference between an element and a node in XML?
...eutrons and electrons, which in turn can be broken into quarks, neutrinos, etc. It's better to understand what a 'node' means in graph theory, and then you'll understand why the XML designers chose that name (the DOM is just a hierarchical graph).
– Les Hazlewood
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