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What are metaclasses in Python?
...n Python. Classes are objects too.
Yes, objects.
As soon as you use the keyword class, Python executes it and creates
an OBJECT. The instruction
>>> class ObjectCreator(object):
... pass
...
creates in memory an object with the name "ObjectCreator".
This object (the class) is itself ...
How to detect a Christmas Tree? [closed]
...oach that takes in consideration the object brightness and shape. In other words, it seeks for objects with triangle-like shape and with significant brightness. It was implemented in Java, using Marvin image processing framework.
The first step is the color thresholding. The objective here is to fo...
How to implement classic sorting algorithms in modern C++?
...ecause they contain links to entire Q&As themselves. Implementing real-word sorting routines is hard!
– TemplateRex
Aug 7 '14 at 13:27
...
What is the best regular expression to check if a string is a valid URL?
... Yes, http://com is a valid URL. http://localhost is, why wouldn't other words be? You are correct that the u modifier is necessary in PHP. I want to be clear that while I generated these with PHP, they are not meant to be PHP-specific.
– eyelidlessness
Nov 2...
How do I pass a unique_ptr argument to a constructor or a function?
...rable as well.
Returning a smart pointer: always by value
To conclude a word about returning a smart pointer, presumably pointing to an object created for use by the caller. This is not really a case comparable with passing pointers into functions, but for completeness I would like to insist that...
Reference: mod_rewrite, URL rewriting and “pretty links” explained
... (.*) and captures it ((..)), then rewrites it to append ".html". In other words, if /foo/bar was the requested URL, it will be handled as if /foo/bar.html had been requested. See http://regular-expressions.info for more information about regular expression matching, capturing and replacements.
Ano...
TLSF源码及算法介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...) {
ERROR_MSG("init_memory_pool (): mem_pool must be aligned to a word\n");
return -1;
}
tlsf = (tlsf_t *) mem_pool;
/* Check if already initialised */
if (tlsf->tlsf_signature == TLSF_SIGNATURE) {
mp = mem_pool;
b = GET_NEXT_BLOCK(mp, ROUNDUP_...
What is a plain English explanation of “Big O” notation?
...mplexity of an algorithm.
There are some important and deliberately chosen words in that sentence:
relative: you can only compare apples to apples. You can't compare an algorithm that do arithmetic multiplication to an algorithm that sorts a list of integers. But a comparison of two algorithms t...
SQL query return data from multiple tables
...ware VALUES (3,'Dictionary','contains description, synonym, antonym of the words');
CREATE TABLE VersionList
(
SoftwareID INT,
VersionNo INT,
DateReleased DATE,
CONSTRAINT sw_uq UNIQUE (SoftwareID, VersionNo),
CONSTRAINT sw_fk FOREIGN KEY (SOftwareID) REFERENCES Software(ID)
);
...
What are the differences between virtual memory and physical memory?
...ailable, as other softwares will be running parallelly as well!). In other words, you cannot run a high-memory consuming app in your ramshackle 1 GB PC.
Okay, so now you decide that you no longer need to keep Eclipse and Chrome open, you close them to free up some memory. The space occupied in RAM...