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Base64: What is the worst possible increase in space usage?
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From Wikipedia
Note that given an input of n bytes,
the output will be (n + 2 - ((n + 2) %
3)) / 3 * 4 bytes long, so that the
number of output bytes per input byte
converges to 4 / 3 or 1.33333 for
large n.
S...
Can I call memcpy() and memmove() with “number of bytes” set to zero?
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From the C99 standard (7.21.1/2):
Where an argument declared as size_t n specifies the length of the array for a
function, n can have the value zero on a call to that function. Unless explicitly stated
otherwise in th...
How do you take a git diff file, and apply it to a local branch that is a copy of the same repositor
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If the patch application fails and if the commits the diff was generated from are actually in your repo, you can use the -3 option of apply that tries to merge in the changes.
It also works with Unix pipe as follows:
git diff d892531 815a3b5 | git apply
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Setting a timeout for socket operations
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socket.connect(new InetSocketAddress(ipAddress, port), 1000);
Quoting from the documentation
connect
public void connect(SocketAddress endpoint, int timeout) throws IOException
Connects this socket to the server with a specified timeout value. A timeout of zero is interpreted as an i...
How do I pipe a subprocess call to a text file?
...object or a file descriptor. The first is the default, stdout is inherited from the parent (your script). The second allows you to pipe from one command/process to another. The third and fourth are what you want, to have the output written to a file.
You need to open a file with something like open...
How can mixed data types (int, float, char, etc) be stored in an array?
...lowing you to use them freely without worrying about segfault or anything. From the linked Wikipedia article above:
A significant example of the use of tagged pointers is the Objective-C runtime on iOS 7 on ARM64, notably used on the iPhone 5S. In iOS 7, virtual addresses are 33 bits (byte-aligned)...
How do I write a “tab” in Python?
...f some of the more useful escape sequences and a description of the output from them.
Escape Sequence Meaning
\t Tab
\\ Inserts a back slash (\)
\' Inserts a single quote (')
\" Inserts a double quote (")
\n ...
Difference between this and self in self-type annotations?
...alias for this in trait A. This is useful for accessing the this reference from an inner class. I.e. you could then use self instead of A.this when accessing the this reference of the trait A from a class nested within it. Example:
class MyFrame extends JFrame { frame =>
getContentPane().a...
Why does Math.round(0.49999999999999994) return 1?
...t. 1.4999999999999998 is the smallest double less than 1.5. As you can see from the question, the floor method rounds it correctly.
– OrangeDog
Mar 29 '12 at 11:12
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Calculating a directory's size using Python?
...ecently I've been using pathlib more and more, here's a pathlib solution:
from pathlib import Path
root_directory = Path('.')
sum(f.stat().st_size for f in root_directory.glob('**/*') if f.is_file())
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