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Why return NotImplemented instead of raising NotImplementedError
...ereas NotImplemented doesn't get raised and can be used in further tests.
http://jcalderone.livejournal.com/32837.html
To summarise that link:
"NotImplemented signals to the runtime that it should ask someone else to satisfy the operation. In the expression a == b, if a.__eq__(b) returns NotIm...
NodeJS: How to get the server's port?
You often see example hello world code for Node that creates an Http Server, starts listening on a port, then followed by something along the lines of:
...
Django, creating a custom 500/404 error page
...e for Django 2.0
Signatures for handler views were changed in Django 2.0:
https://docs.djangoproject.com/en/2.0/ref/views/#error-views
If you use views as above, handler404 will fail with message:
"handler404() got an unexpected keyword argument 'exception'"
In such case modify your views l...
Can I load a UIImage from a URL?
...Quick example:
[cell.imageView setImageWithURL:[NSURL URLWithString:@"http://www.domain.com/path/to/image.jpg"] placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
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How to work with complex numbers in C?
...table extension (e.g. IBM XL, GCC, may be intel,... ).
You can start from http://en.wikipedia.org/wiki/Complex.h - it gives a description of functions from complex.h
This manual http://pubs.opengroup.org/onlinepubs/009604499/basedefs/complex.h.html also gives some info about macros.
To declare a ...
Calling parent class __init__ with multiple inheritance, what's the right way?
...h invokes A's code which will also call super which invokes B's code. See http://rhettinger.wordpress.com/2011/05/26/super-considered-super for more detail on what can be done with super.
[Response question as later edited]
So it seems that unless I know/control the init's of the classes I
i...
Where in a virtualenv does the custom code go?
...d tear down virtualenvs it would make sense to look at virtualenvwrapper.
http://pypi.python.org/pypi/virtualenvwrapper
With virtualenvwrapper you can
* create and delete virtual environments
* organize virtual environments in a central place
* easily switch between environments
You no more ...
How would one write object-oriented code in C? [closed]
...mmClass *tcp) {
tcp->open = &tcpOpen;
return 0;
}
And the HTTP one as well:
// Function for the HTTP 'class'.
static int httpOpen (tCommClass *http, char *fspec) {
printf ("Opening HTTP: %s\n", fspec);
return 0;
}
static int httpInit (tCommClass *http) {
http->open ...
Why is nginx responding to any domain name?
...I personally use separate vhost conf files with this as so (CentOS/RHEL):
http {
[...]
# Default server
server {
return 404;
}
# Other servers
include /etc/nginx/conf.d/*.conf;
}
/etc/nginx/conf.d/ will contain domain_1.conf, domain_2.conf... domain_n.conf which wi...
Check if URL has certain string with PHP
...builds your URL and the rest check if it contains the word "car".
$url = 'http://' . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
if (strpos($url,'car') !== false) {
echo 'Car exists.';
} else {
echo 'No cars.';
}
...