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How do malloc() and free() work?
...ee does the following:
Get a block of memory from the OS through sbrk() (Unix call).
Create a header and a footer around that block of memory with some information such as size, permissions, and where the next and previous block are.
When a call to malloc comes in, a list is referenced which point...
'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
...nd of information is mostly used in low-level operating system interfaces (unix permission bits, for example). Most python programs won't need to know that.
The logical operations (and, or, not), however, are used all the time.
...
How line ending conversions work with git core.autocrlf between different operating systems
...F | CRLF -> LF | CRLF -> LF | as-is | as-is | as-is | as-is
Unix -LF | as-is | as-is | as-is | LF -> CRLF | as-is | as-is
Mac -CR | as-is | as-is | as-is | as-is | as-is | as-is
Mixed-CRLF+LF | as-is | as-is | as-is | as-is ...
What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
...
Not the answer you're looking for? Browse other questions tagged unix sorting or ask your own question.
Bash tool to get nth line from a file
...e are operations that you would expect to be heavily optimized in a modern Unix system.
To get an idea about the performance differences, these are the number that I get for a huge file (9.3G):
tail -n+N | head -1: 3.7 sec
head -N | tail -1: 4.6 sec
sed Nq;d: 18.8 sec
Results may differ, but th...
How can bcrypt have built-in salts?
... 10 does. To clear up other misinformation, PHP's crypt function uses the unix crypt library which is implemented in c.
– thomasrutter
Jul 3 '12 at 13:02
...
How do BitTorrent magnet links work?
...ss you can test it by deleting the config files (~/.config/transmission on unix), and blocking all communication to dht.transmissionbt.com, and see what happens (wait 240 seconds at least).
So it appears the client has a bootstrap node built in to start with. Of course, once it has gotten into the ...
How to search file text for a pattern and replace it with a given value
...r version that doesn't worry about every possible edge case (if you are on Unix and don't care about writing to /proc):
#!/usr/bin/env ruby
require 'tempfile'
def file_edit(filename, regexp, replacement)
Tempfile.open(".#{File.basename(filename)}", File.dirname(filename)) do |tempfile|
File....
What is a patch in git version control?
...
Patch is a Unix program that updates text files according to instructions contained in a separate file, called a patch file.
So, in other words it may mean the file with instructions or a program that processes that file and applies it...
Where is Python's sys.path initialized from?
...(on Windows) or lib/pythonX.Y/site-packages
and then lib/site-python (on Unix and Macintosh). For each of the
distinct head-tail combinations, it sees if it refers to an existing
directory, and if so, adds it to sys.path and also inspects the newly
added path for configuration files.
...