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How often should you use git-gc?
... that, well, the garbage gets collected. As we all know as computer users, files we consider garbage right now might turn out to be very valuable three days in the future. The fact that git keeps most of its debris around has saved my bacon several times – by browsing all the dangling commits, I h...
What does the ??!??! operator do in C?
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And then there is the <iso646.h> header file.
– David R Tribble
Oct 25 '19 at 21:08
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What is a plain English explanation of “Big O” notation?
... have polynomial complexity or is solvable in polynomial time.
O(n), O(n2) etc. are all polynomial time. Some problems cannot be solved in polynomial time. Certain things are used in the world because of this. Public Key Cryptography is a prime example. It is computationally hard to find two prime f...
Determine if code is running as part of a unit test
...Dialogs. The implementation class displays all pop up dialogs (MessageBox, File dialogs, Color picker, database connection dialog etc). Classes that need to display message boxes accept ICommonDiaglogs as a constructor parameter that we can then mock in the unit test. Bonus: You can assert on expect...
Should services always return DTOs, or can they also return domain models?
...ax)
Project lifetime is 2 years or so.
No separate team for GUI, backend, etc.
Arguments Against DTO
Duplication of code.
Cost of development time, debugging. (use DTO generation tools http://entitiestodtos.codeplex.com/)
You must synchronize both models all the time.
Cost of developement: Ad...
IntelliJ IDEA hint parameters of method
...ting the "Autopopup"-timer in IntelliJ / PhpStorm settings.
Navigate to:
File -> Settings -> Editor -> General -> Code Completion -> Autopopup in (ms)
Set it to whatever you like. Etc. 5 ms.
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How can I mock requests and the response?
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This is how you can do it (you can run this file as-is):
import requests
import unittest
from unittest import mock
# This is the class we want to test
class MyGreatClass:
def fetch_json(self, url):
response = requests.get(url)
return response.json...
Setting variable to NULL after free
... when freeing a struct that holds resources, pointers to allocated memory, file handles, etc., as I free the contained memory pointers and close the contained files, I NULL respective members. Then if one of the resources is accessed via a dangling pointer by mistake, the program tends to fault righ...
MongoDB with redis
...s associated operations (union, intersection, difference on multiple sets, etc ...). It is quite easy to implement a basic faceted search or tagging engine on top of this feature, which is an interesting addition to MongoDB more traditional indexing capabilities.
Redis supports efficient blocking po...
What is a “web service” in plain English?
I've been reading about "web services" here on SO, on Wikipedia, Google, etc., and I don't quite understand what they are. What is the plain English definition/description?
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