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Why do I need 'b' to encode a string with Base64?
...
>>> data = b'test'
>>> for byte in data:
... print(format(byte, '08b'), end=" ")
...
01110100 01100101 01110011 01110100
>>>
If you interpret that binary data as a single integer, then this is how you would convert it to base-10 and base-64 (table for base-64):
ba...
Read/write to Windows registry using Java
...ion("hkey=" + hkey);
}
}
/**
* Read value(s) and value name(s) form given key
* @param hkey HKEY_CURRENT_USER/HKEY_LOCAL_MACHINE
* @param key
* @return the value name(s) plus the value(s)
* @throws IllegalArgumentException
* @throws IllegalAccessException
* @throws In...
Generic method multiple (OR) type constraint
...ossiblities:
Define more than one method that defines each possible transformation, behavior, or whatever. That's Botz's answer. In the programming world this is referred to as Overloading the method.
Define a base class or interface that knows how to do all the things that you need for the meth...
Which iomanip manipulators are 'sticky'?
...at setw appears to behave differently is because there are requirements on formatted output operations to explicitly .width(0) the output stream.
The following is the discussion that lead to the above conclusion:
Looking at the code the following manipulators return an object rather than a stre...
Break a previous commit into multiple commits
...n check out the content of that commit over my working directory using the form of git checkout which takes both a commit and a file location. Here I use . as the file location to replace the whole working copy:
git checkout 65dfb6a .
Don't miss the dot on the end!
This will check out, and stage...
What is the difference between a port and a socket?
...52.94.236:80. If all you have is address and port, you don't have enough information to tell these sockets apart. It's not enough information to identify a socket.
Addendum
Paragraph two of section 2.7 of RFC793 says
A connection is fully specified by the pair of sockets at the ends. A
loca...
Optional Parameters with C++ Macros
...
Here's one way to do it. It uses the list of arguments twice, first to form the name of the helper macro, and then to pass the arguments to that helper macro. It uses a standard trick to count the number of arguments to a macro.
enum
{
plain = 0,
bold = 1,
italic = 2
};
void Print...
Best Practices: Salting & peppering passwords?
...ause it's being used as designed. It's good because it gives the user no information.
Let's look at that line again. Let's say that an attacker knows your algorithm (which is required for security, otherwise it's security through obscurity). With a traditional pepper approach, the attacker can crea...
reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
...iable, all as an atomic operation.
my colleague said that on some platforms it's not guaranteed that reference assignment is atomic. Was my colleague correct?
No. Reference assignment is guaranteed to be atomic on all .NET platforms.
My colleague is reasoning from false premises. Does tha...
Comparing Haskell's Snap and Yesod web frameworks
...ave sessions and authentication, interfaces to several databases, and nice form handling (here and here) using digestive-functors that includes prepackaged support for arbitrarily nested dynamically sizable lists. These are just some of the growing ecosystem of pluggable snaplets. The sessions and...