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DDD - the rule that Entities can't access Repositories directly
...fferent.
Back to your original question. If you're accessing a repository from within an entity it means the entity is really not a business entity but probably something that should exist in a service layer. This is because entities are business object and should concern themselves with being as m...
What are “named tuples” in Python?
...This leads to code like the following:
pt1 = (1.0, 5.0)
pt2 = (2.5, 1.5)
from math import sqrt
line_length = sqrt((pt1[0]-pt2[0])**2 + (pt1[1]-pt2[1])**2)
Using a named tuple it becomes more readable:
from collections import namedtuple
Point = namedtuple('Point', 'x y')
pt1 = Point(1.0, 5.0)
pt...
Should I use a class or dictionary?
...lass. You could also use a namedtuple for a hybrid approach:
>>> from collections import namedtuple
>>> request = namedtuple("Request", "environ request_method url_scheme")
>>> request
<class '__main__.Request'>
>>> request.environ = "foo"
>>> requ...
mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
...t "slave okay" mode to let the mongo shell know that you're allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from secondaries.
...
Age from birthdate in python
How can I find an age in python from today's date and a persons birthdate? The birthdate is a from a DateField in a Django model.
...
Returning a value from thread?
How do I return a value from a thread?
17 Answers
17
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Refresh image with a new one at the same url
...en you want to cache images, but may need to update them at the server end from time to time without changing the filename itself. AND when you can easily ensure that the correct querystring is added to every image instance in your HTML.
(3) Serve your images with the header Cache-control: max-ag...
How to import a module given the full path?
...
For Python 3.5+ use:
import importlib.util
spec = importlib.util.spec_from_file_location("module.name", "/path/to/file.py")
foo = importlib.util.module_from_spec(spec)
spec.loader.exec_module(foo)
foo.MyClass()
For Python 3.3 and 3.4 use:
from importlib.machinery import SourceFileLoader
foo...
What is dynamic programming? [closed]
...imal sub-structure (e.g., every subset of any path along the shortest path from A to B is itself the shortest path between the 2 endpoints assuming a distance metric that observes the triangle inequality).
– Shea
Jun 30 '09 at 19:56
...
How to remove CocoaPods from a project?
What's the right way of removing CocoaPods from a project? I want to remove the whole CocoaPod. Due to some limitations imposed by my client I can't use it. I need to have just one xcodeproj instead of an xcworkspace.
...