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How to add property to a class dynamically?
...f: self.a + 1)
>>> foo.b
4
A property is actually a simple implementation of a thing called a descriptor. It's an object that provides custom handling for a given attribute, on a given class. Kinda like a way to factor a huge if tree out of __getattribute__.
When I ask for foo.b in the...
A definitive guide to API-breaking changes in .NET
... API changes do or do not break client applications. First, let's define some terms:
16 Answers
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What is the in a .vimrc file?
...e <leader> in many .vimrc files, and I am wondering what does it mean?
5 Answers
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How do I do an initial push to a remote repository with Git?
...dd the origin, there are several formats and schemas you could use. I recommend you see what your hosting service provides.
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Can I get a patch-compatible output from git-diff?
I am doing something very simple wrong. I'm trying to prepare an ordinary patch file, so I can reapply some changes:
5 Ans...
Iteration over std::vector: unsigned vs signed index variable
...rating forwards is almost identical. Just change the iterators / swap decrement by increment. You should prefer iterators. Some people tell you to use std::size_t as the index variable type. However, that is not portable. Always use the size_type typedef of the container (While you could get away wi...
Sequelize.js: how to use migrations and sync
...The syntax is rather plain:
sequelize init
...
sequelize model:create --name User --attributes first_name:string,last_name:string,bio:text
This will create both model AND migration. Then, manually merge your existing models with generated with sequelize-cli, and do the same with migrations. After...
Django's SuspiciousOperation Invalid HTTP_HOST header
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If your ALLOWED_HOSTS is set correctly, then it is possible someone is probing your site for the vulnerability by spoofing the header.
There is discussion right now by the Django developers to change this from a 500 internal server error to a 400 response. See this ticket.
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How do you create nested dict in Python?
...rkey': 'value'}}
You can populate that however you want.
I would recommend in your code something like the following:
d = {} # can use defaultdict(dict) instead
for row in file_map:
# derive row key from something
# when using defaultdict, we can skip the next step creating a dictio...
What does ON [PRIMARY] mean?
I'm creating an SQL setup script and I'm using someone else's script as an example. Here's an example of the script:
4 Ans...