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How to convert Strings to and from UTF8 byte arrays in Java
In Java, I have a String and I want to encode it as a byte array (in UTF8, or some other encoding). Alternately, I have a byte array (in some known encoding) and I want to convert it into a Java String. How do I do these conversions?
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warning: refname 'HEAD' is ambiguous
...called HEAD which is absolutely dangerous, since that's the symbolic name for whatever branch is the current branch.
Rename it:
git branch -m HEAD newbranch
then you can examine it and decide what to do (delete it, or save under a descriptive branch name)
(The origin/HEAD remote branch is not a...
Git: How to return from 'detached HEAD' state
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If you remember which branch was checked out before (e.g. master) you could simply
git checkout master
to get out of detached HEAD state.
Generally speaking: git checkout <branchname> will get you out of that.
If you don't remember the last branch name, try
git...
What is the purpose of the -nodes argument in openssl?
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The option -nodes is not the English word "nodes", but rather is "no DES". When given as an argument, it means OpenSSL will not encrypt the private key in a PKCS#12 file.
To encrypt the private key, you can omit -nodes and your key will be encrypted with 3DES-C...
Understanding recursion [closed]
I'm having major trouble understanding recursion at school. Whenever the professor is talking about it, I seem to get it but as soon as I try it on my own it completely blows my brains.
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What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
...quite a bit, and I haven't really seen any mention of run-time complexity for any of the LINQ methods. Obviously, there are many factors at play here, so let's restrict the discussion to the plain IEnumerable LINQ-to-Objects provider. Further, let's assume that any Func passed in as a selector /...
What's the fastest way to loop through an array in JavaScript?
I learned from books that you should write for loop like this：
22 Answers
22
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Define a lambda expression that raises an Exception
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There is more than one way to skin a Python:
y = lambda: (_ for _ in ()).throw(Exception('foobar'))
Lambdas accept statements. Since raise ex is a statement, you could write a general purpose raiser:
def raise_(ex):
raise ex
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SignalR: Why choose Hub vs. Persistent Connection?
...tent connections.
From the highly up-voted comment below:
Partially correct. You can get topics or groups in persistent connections as well. The big difference is dispatching different types of messages. For example you have different kinds of messages and you want to send different kinds of p...
Defeating a Poker Bot
...ha inputs that are triggered by
suspicious activity.
Some poker sites monitor playing
times and patterns (i.e., worst case
scenario is a player who plays 24x7
and 16 tables continuously, there is
a tiny tiny chance this is a real
human. (However some players do have the ability to play very large ha...