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When to use IComparable Vs. IComparer
...< and > operators (see Code Analysis warning CA1036).
Quoting Dave G from this blog post:
But the correct answer is to implement IComparer instead of IComparable if your objects are mutable, and pass an instance of the IComparer to sorting functions when necessary.
Since the IComparer is just...
How to check if a string in Python is in ASCII?
...f-8, or any other encoding. The source of your string (whether you read it from a file, input from a keyboard, etc.) may have encoded a unicode string in ascii to produce your string, but that's where you need to go for an answer.
Perhaps the question you can ask is: "Is this string the result of e...
Why use double indirection? or Why use pointers to pointers?
...s a memory leak. The pointer value to be passed free is lost by returning from the function.
– alk
Apr 16 '19 at 16:44
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Calling a base class's classmethod in Python
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If you're using a new-style class (i.e. derives from object in Python 2, or always in Python 3), you can do it with super() like this:
super(Derived, cls).do(a)
This is how you would invoke the code in the base class's version of the method (i.e. print cls, a), from the...
Python - List of unique dictionaries
... @John La Rooy - how could one use the same to remove dictionarys from a list based on multiple attributes , tried this but seems not to work > {v['flight']['lon']['lat']: v for v in stream}.values()
– Jorge Vidinha
Sep 13 '15 at 10:04
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Best way to convert string to bytes in Python 3?
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+1 for having a good argument and quotes from the python docs. Also unicode_string.encode(encoding) matches nicely with bytearray.decode(encoding) when you want your string back.
– Serdalis
Sep 28 '11 at 15:30
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How to Find And Replace Text In A File With C#
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You're going to have a hard time writing to the same file you're reading from. One quick way is to simply do this:
File.WriteAllText("test.txt", File.ReadAllText("test.txt").Replace("some text","some other text"));
You can lay that out better with
string str = File.ReadAllText("test.txt");
str...
Insert an element at a specific index in a list and return the updated list
...:
>>> a = [1, 2, 4]
>>> insert_at = 2 # Index starting from which multiple elements will be inserted
# List of elements that you want to insert together at "index_at" (above) position
>>> insert_elements = [3, 5, 6]
>>> a[insert_at:insert_at] = insert_elements...
add created_at and updated_at fields to mongoose schemas
...(),
}
Check my original answer below on how to get the created timestamp from the _id field.
If you need to use IDs from external system, then check Roman Rhrn Nesterov's answer.
UPDATE: (2.5 years later)
You can now use the #timestamps option with mongoose version >= 4.0.
let ItemSchema = n...
Proxy with express.js
...e-domain AJAX issues, I want my node.js web server to forward all requests from URL /api/BLABLA to another server, for example other_domain.com:3000/BLABLA , and return to user the same thing that this remote server returned, transparently.
...