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Fastest way to get the first object from a queryset in django?
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also, first() and last() enforce an ORDER BY clause on a query. It will make the results deterministic but will most probably slow the query down.
– Phil Krylov
Jun 27 '17 at 19:24
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Preventing form resubmission
... browser has for inspecting outgoing HTTP requests and check out the HTTP calls. You should see the first one (posting the form data) happening with the POST method, returning HTTP code 301 with Location header pointing to itself, and then immediately you should be seeing another HTTP query to the s...
Git is ignoring files that aren't in gitignore
...se --show-toplevel)"/.git/info/exclude
Alternatively use git add -f which allows adding otherwise ignored files.
See: man gitignore, man git-check-ignore for more details.
Syntax
git check-ignore [options] pathname…
git check-ignore [options] --stdin
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Difference between Repository and Service Layer?
...ce layer This part operates on view models.
EDIT:
Example of flow for /Orders/ByClient/5 (we want to see order for specific client):
public class OrderController
{
private IOrderService _orderService;
public OrderController(IOrderService orderService)
{
_orderService = orde...
Is Big O(logn) log base e?
... big-O notation is usually written showing only the asymptotically highest order of n, so constant coefficients will drop away. Since a different logarithm base is equivalent to a constant coefficient, it is superfluous.
That said, I would probably assume log base 2.
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Formatting code in Notepad++
... To fix that you can do this stackoverflow.com/questions/6985637/… After all of that you should be able to TextFX -> HTML Tidy -> Tidy: Reindent XML as @gablin described.
– darren
Feb 1 '12 at 10:15
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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
... @YoYoYonnY that's not possible. The compiler is not allowed to reorder struct members although gcc has an experimental option to do that
– phuclv
Mar 2 '17 at 2:57
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What's the difference between SortedList and SortedDictionary?
...--------+---------+
* Insertion is O(1) for data that are already in sort order, so that each
element is added to the end of the list (assuming no resize is required).
From an implementation perspective:
+------------+---------------+----------+------------+------------+------------------+
| ...
What is the difference between require and require-dev sections in composer.json?
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Different Environments
Typically, software will run in different environments:
development
testing
staging
production
Different Dependencies in Different Environments
The dependencies which are declared in the require section of composer.json are t...
What is a mixin, and why are they useful?
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This particular example could have been achieved via the functools.total_ordering() decorator, but the game here was to reinvent the wheel:
import functools
@functools.total_ordering
class Integer(object):
def __init__(self, i):
self.i = i
def __le__(self, other):
return s...