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how to calculate binary search complexity
...is just formal mathematical lingo in order to be able to prove statements, etc. It has a very straightforward explanation. When n grows very large, the log n function will out-grow the time it takes to execute the function. The size of the "input set", n, is just the length of the list.
Simply put,...
Difference between single and double quotes in Bash
... double quotes will. For example: variables, backticks, certain \ escapes, etc.
Example:
$ echo "$(echo "upg")"
upg
$ echo '$(echo "upg")'
$(echo "upg")
The Bash manual has this to say:
3.1.2.2 Single Quotes
Enclosing characters in single quotes (') preserves the literal value of each ...
Node.js - Find home directory in platform agnostic way
...ization in terms of trailing slashes, potentially odd forward/backslashes, etc... (especially if you got file operations in mind, after getting this info)
– Frank Nocke
Oct 16 '17 at 12:37
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Difference in make_shared and normal shared_ptr in C++
...e control block (stores meta data such as ref-counts, type-erased deleter, etc)
the object being managed
std::make_shared performs a single heap-allocation accounting for the space necessary for both the control block and the data. In the other case, new Obj("foo") invokes a heap-allocation for th...
Where are environment variables stored in registry?
...
User path variables (My Documents, AppData, etc) are stored at HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
– mythofechelon
Jul 31 '13 at 20:21
...
Why is Magento so slow? [closed]
...ehind the scenes (application configuration, system config, layout config, etc.) that involve building up giant XML trees in memory and then "querying" those same trees for information. This takes both memory (storing the trees) and CPU (parsing the trees). Some of these (especially the layout tre...
phpinfo() - is there an easy way for seeing it?
...eb server make sure you specify the ini file path, for example...
php -c /etc/php/apache2/php.ini -i
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What does `kill -0 $pid` in a shell script do?
...istence of a process.
Do various error checking on the process (PID, PGID, etc ...).
It will not send any output to stdout upon success.
Send an error message to stderr if something is not right.
Give you a false positive if the process is defunct (i.e. Zombie).
More explicitly, a useful function ...
Queue.Queue vs. collections.deque
...ation.
In fact the heavy usage of an extra mutex and extra method ._get() etc. method calls in Queue.py is due to backwards compatibility constraints, past over-design and lack of care for providing an efficient solution for this important speed bottleneck issue in inter-thread communication. A lis...
How do I pass the this context to a function?
...call:
var f = function () { console.log(this); }
f.call(that, arg1, arg2, etc);
Where that is the object which you want this in the function to be.
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