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What is the dependency inversion principle and why is it important?
... should depend upon abstractions.
Abstractions should never depend upon details. Details should depend upon abstractions.
As to why it is important, in short: changes are risky, and by depending on a concept instead of on an implementation, you reduce the need for change at call sites.
Effectivel...
Parsing IPv6 extension headers containing unknown extensions
I'm writing a very simple net filter, and getting to where I want to parse IPv6 headers to match things like ICMPv6 types, TCP/UDP port numbers, etc.
...
How to provide user name and password when connecting to a network share
...etAddConnection2. I prefer the latter, as I sometimes need to maintain multiple credentials for different locations. I wrap it into an IDisposable and call WNetCancelConnection2 to remove the creds afterwards (avoiding the multiple usernames error):
using (new NetworkConnection(@"\\server\read", re...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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gunicorn autoreload on source change
... If you do, Bryan Helmig's approach is better even though it requires the pipable package, watchdog.
– hobs
Dec 19 '13 at 18:10
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Push Notifications in Android Platform
...s it keep a socket open at all times? How does it notify the server if its ip address has changed? Would appreciate it if you could shed some light on this. Cheers Naren
– Naren
Nov 5 '09 at 6:14
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What ports does RabbitMQ use?
...:
eric@dev ~$ sudo lsof -i | grep beam
beam.smp 21216 rabbitmq 17u IPv4 33148214 0t0 TCP *:55672 (LISTEN)
beam.smp 21216 rabbitmq 18u IPv4 33148219 0t0 TCP *:15672 (LISTEN)
use nmap from a different machine, find out if 5672 is open:
sudo nmap -p 5672 10.0.1.71
Starting...
How to display unique records from a has_many through relationship?
... the best way to display unique records from a has_many, through relationship in Rails3.
4 Answers
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Will HTML5 allow web apps to make peer-to-peer HTTP connections?
...formed answer:
HTML 5 plans to allow peer to peer connections from javascript, but these connections WILL NOT BE RAW TCP.
The complete spec can be found at http://dev.w3.org/html5/websockets/
jrh
EDIT: with specific reference to peer to peer connections, check out these links:
Regarding peer t...
Emulating a do-while loop in Bash
...is construct on the command line, I wouldn't do it as a one-liner (in a script, specifically) since the intent is unreadable.
– Paused until further notice.
Oct 19 '16 at 19:59
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