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When is it appropriate to use UDP instead of TCP? [closed]
...plement your own protocol for reliability or to resend. DNS is the perfect description of this use case. The costs of connection setups are way too high (yet, DNS
does support a TCP mode as well).
Another case is when you are delivering data that can be lost because newer data coming in will replac...
Java heap terminology: young, old and permanent generations?
...ain object heap.
Here is a good post on permanent generation.
I like the descriptions given for each space in Oracle's guide on JConsole:
For the HotSpot Java VM, the memory
pools for serial garbage collection
are the following.
Eden Space (heap): The pool from which memory is init...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...(2.6.32-40-generic #87-Ubuntu) suggests:
/sys/class/tty
Which gives you descriptions of all TTY devices known to the system. A trimmed down example:
# ll /sys/class/tty/ttyUSB*
lrwxrwxrwx 1 root root 0 2012-03-28 20:43 /sys/class/tty/ttyUSB0 -> ../../devices/pci0000:00/0000:00:1d.0/usb2/2-1/2...
Python circular importing?
...ng, but it would be difficult for the author to give this admirably clear description of what's going on without some reference to Python's, somewhat obscured, "compile time".
– Hank
Oct 31 '17 at 19:48
...
Django: How to manage development and production settings?
I have been developing a basic app. Now at the deployment stage it has become clear I have need for both a local settings and production settings.
...
Undefined method 'task' using Rake 0.9.0
...le:
require 'rake'
# Rake Fix Code start
# NOTE: change 'Anelis' to your app's module name (see config/application.rb)
module ::Anelis
class Application
include Rake::DSL
end
end
module ::RakeFileUtils
extend Rake::FileUtilsExt
end
# Rake Fix Code end
MyApp::Application.load_tasks
Th...
Difference between DTO, VO, POJO, JavaBeans?
...e objects). For a more formal definition, I often refer to Martin Fowler's description of Value Object:
In Patterns of Enterprise Application Architecture I described Value Object as a small object such as a Money or date range object. Their key property is that they follow value semantics rathe...
What is Java EE? [duplicate]
...are they really asking for? Experience with EJBs? Experience with Java web apps?
9 Answers
...
Is it bad to have my virtualenv directory inside my git repository?
I'm thinking about putting the virtualenv for a Django web app I am making inside my git repository for the app. It seems like an easy way to keep deploy's simple and easy. Is there any reason why I shouldn't do this?
...
Why is it not advisable to have the database and web server on the same machine?
...k Overflow team ( part 1 and 2 ), he was adamant that the SQL server and application server should be on separate machines. Is this just to make sure that if one server is compromised, both systems aren't accessible? Do the security concerns outweigh the complexity of two servers (extra cost, de...