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One DbContext per web request… why?
... have been reading a lot of articles explaining how to set up Entity Framework's DbContext so that only one is created and used per HTTP web request using various DI frameworks.
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Named Branches vs Multiple Repositories
...tively large codebase. Each release gets its own branch, and fixes are performed against the trunk and migrated into release branches using svnmerge.py
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Extract TortoiseSVN saved password
Is there any way to extract credentials saved by TortoiseSVN?
2 Answers
2
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What's a quick way to test to see a file exists?
...o quickly check to see if a file exists in my iPhone app's Documents directory (or any path for that matter). I can enumerate through the directory's files, or I can try to open a specific file. What's the fastest way? I just need to know if the file is there or if it does not exist.
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How do I get Flask to run on port 80?
I have a Flask server running through port 5000, and it's fine. I can access it at http://example.com:5000
14 Answers
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Which is better, return value or out parameter?
...od with an out parameter, if I had the choice. C# 7's Deconstruct methods for language-supported deconstruction acts as a very, very rare exception to this rule.)
Aside from anything else, it stops the caller from having to declare the variable separately:
int foo;
GetValue(out foo);
vs
int foo...
SBT stop run without exiting
...you can't easily kill them separately.
If you do your run in a separate, forked JVM, as described at Forking, then you can kill that JVM (by any means your operating system offers) without affecting sbt's JVM:
fork in run := true
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Run a callback only if an attribute has changed in Rails
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Rails 5.1+
class Page < ActiveRecord::Base
before_save :do_something, if: :will_save_change_to_status_id?
private
def do_something
# ...
end
end
The commit that changed ActiveRecord::Dirty is here: https://github.com/rails/rails/commit/16ae3d...
How to get element by class name? [duplicate]
...ctually getElementsByClassName, not getElementByClassName, simply because more than one element on the page can have the same class, hence: Elements.
The return value of this will be a NodeList instance, or a superset of the NodeList (FF, for instance returns an instance of HTMLCollection). At any ...
How to prevent multiple instances of an Activity when it is launched with different Intents
...ication when it is launched using the "Open" button on the Google Play Store app (previously called Android Market). It seems that launching it from the Play Store uses a different Intent than launching it from the phone's application menu of icons. This is leading to multiple copies of the same...