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What is RSS and VSZ in Linux memory management
What are RSS and VSZ in Linux memory management? In a multithreaded environment how can both of these can be managed and tracked?
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How to read a large file - line by line?
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The with statement handles opening and closing the file, including if an exception is raised in the inner block. The for line in f treats the file object f as an iterable, which automatically uses buffered I/O and memory management so you don't have to worry about large files.
There should be o...
How to pass objects to functions in C++?
I am new to C++ programming, but I have experience in Java. I need guidance on how to pass objects to functions in C++.
7 A...
What would cause an algorithm to have O(log log n) complexity?
...s some of the factors that might cause an algorithm to have O(log n) complexity.
2 Answers
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base64 encoded images in email signatures
...line tool or a few lines of code to generate the base 64 string.
The syntax to source the image from inline data is:
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA
AAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO
9TXL0Y4OHwAAAABJRU5ErkJggg==" alt="Red dot">
http:/...
Performance of foreach, array_map with lambda and array_map with static function
... just did the benchmark since poster didn't do it. Running on PHP 5.3.10 + XDebug.
UPDATE 2015-01-22 compare with mcfedr's answer below for additional results without XDebug and a more recent PHP version.
function lap($func) {
$t0 = microtime(1);
$numbers = range(0, 1000000);
$ret = $func(...
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
I have taken Problem #12 from Project Euler as a programming exercise and to compare my (surely not optimal) implementations in C, Python, Erlang and Haskell. In order to get some higher execution times, I search for the first triangle number with more than 1000 divisors instead of 500 as stated...
eval command in Bash and its typical uses
...guments, they are first joined with spaces between them.)
${$n} is a syntax error in bash. Inside the braces, you can only have a variable name, with some possible prefix and suffixes, but you can't have arbitrary bash syntax and in particular you can't use variable expansion. There is a way of say...
Is cout synchronized/thread-safe?
...t effect in that particular implementation) are guaranteed to be mutually exclusive, the buffer might be shared by the different threads. This will quickly lead to corruption of the internal state of the stream.
And even if access to the buffer is guaranteed to be thread-safe, what do you think wil...
Learning assembly [closed]
...bled code and maybe being able to write more efficient parts of code (for example, through c++), doing somethings like code caves, etc. I saw there are a zillion different flavors of assembly, so, for the purposes I mention, how should I start? What kind of assembly should I learn? I want to learn b...