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What is the purpose of the single underscore “_” variable in Python?
...cate that part
of a function result is being deliberately ignored (Conceptually, it is being discarded.), as in code like:
label, has_label, _ = text.partition(':').
As part of a function definition (using either def or lambda), where
the signature is fixed (e.g. by a callback or parent class API), ...
Or versus OrElse
...oth terms. When temp Is DBNull.Value, it can't be compared to zero, so it falls over.
You should use... well, whichever one makes sense.
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Getting Django admin url for an object
...e was an easy way to get the admin url of an object, and I had written a small filter that I'd use like this: <a href="{{ object|admin_url }}" .... > ... </a>
...
Why are all fields in an interface implicitly static and final?
I am just trying to understand why all fields defined in an Interface are implicitly static and final . The idea of keeping fields static makes sense to me as you can't have objects of an interface but why they are final (implicitly)?
...
Are HTTP headers case-sensitive?
...case-sensitive.)
If you trust the major browsers to abide by this, you're all set.
BTW, unlike most of HTTP, methods (verbs) are case sensitive:
5.1.1 Method
The Method token indicates the
method to be performed on the
resource identified by the
Request-URI. The method is
case-sens...
How do I include a file over 2 directories back?
.... And (2) you’d still use a relative path in your define, Unless you actually hard-code the whole absolute server path and I would refrain from that since it has only disadvantages. Or (the third alternative) you could use string manipulation to extract parent directory from the (expanded) current...
Python (and Python C API): __new__ versus __init__
...vs immutable types.
__new__ accepts a type as the first argument, and (usually) returns a new instance of that type. Thus it is suitable for use with both mutable and immutable types.
__init__ accepts an instance as the first argument and modifies the attributes of that instance. This is inappropr...
Remove a HTML tag but keep the innerHtml
...
$('b').contents().unwrap();
This selects all <b> elements, then uses .contents() to target the text content of the <b>, then .unwrap() to remove its parent <b> element.
For the greatest performance, always go native:
var b = document.getElement...
How to make an element width: 100% minus padding?
...
box-sizing: border-box is a quick, easy way to fix it:
This will work in all modern browsers, and IE8+.
Here's a demo: http://jsfiddle.net/thirtydot/QkmSk/301/
.content {
width: 100%;
box-sizing: border-box;
}
The browser prefixed versions (-webkit-box-sizing, etc.) are not needed in m...
Python multiprocessing pool.map for multiple arguments
...rmap method, which accepts a sequence of argument tuples. It then automatically unpacks the arguments from each tuple and passes them to the given function:
import multiprocessing
from itertools import product
def merge_names(a, b):
return '{} & {}'.format(a, b)
if __name__ == '__main__':...