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MVC Vs n-tier architecture
...sors), but the point here is N-Tier aludes to a physical network hop (e.g. TCP/IP). Locally you would be more efficent to use named pipes, but again, if you run on the same system you are competitng for memory and processing power. All of these are the reasons to consider isolating presentation, B...
Cassandra port usage - how are the ports used?
...
For Apache Cassandra 2.0 you need to take into account the following TCP ports:
(See EC2 security group configuration and Apache Cassandra FAQ)
Cassandra
7199 JMX monitoring port
1024 - 65355 Random port required by JMX. Starting with Java 7u4 a specific port can be specified using the com....
乐高机器人®组件 · App Inventor 2 中文网
...给个鼓励也行呐~o~ 提供截图（仅截取当前可视区域） delete edit 高亮或隐藏信息 提交 function HideORDispFeedback() { $("#feedback").toggle();}function makeTitleDraggable(el...
Web API 最佳入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...aging/Message Queue/Duplex Communication，选择WCF
如果服务需要在TCP/Named Pipes/UDP (wcf 4.5)，选择WCF
如果服务需要在http协议上，并且希望利用http协议的各种功能，选择Web API
如果服务需要被各种客户端(特别是移动客户端)调用，选择Web API...
使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...以及可以从单个块组成多个块以获得更明确定义的功能的区域。 用户的建议表明，使用更广泛的设备和更多的用户进行进一步测试将更准确地确定蓝牙 LE 组件的兼容性和功能。 这种大规模的可用性测试还将有助于指导如何细化...
What does it mean when an HTTP request returns status code 0?
...urned). This means the connection was accepted and then closed gracefully (TCP FIN).
There are a number of things which could cause this, but based off of your description, some form of firewall seems the most likely culprit.
...
socket.emit() vs. socket.send()
...re, future readers of this post, that this is about socket.io, not node.js TCP, UDP or Unix sockets.
– aredridel
Nov 25 '12 at 16:42
3
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postgresql port confusion 5433 or 5432?
...ng to the same unix socket.
Most Mac users work around this by just using tcp/ip with psql -h localhost. You can also specify a port if required, eg psql -h localhost -p 5433. You might have multiple PostgreSQL instances running so make sure you're connecting to the right one by using select versio...
How to prevent SIGPIPEs (or handle them properly)
I have a small server program that accepts connections on a TCP or local UNIX socket, reads a simple command and, depending on the command, sends a reply. The problem is that the client may have no interest in the answer sometimes and exits early, so writing to that socket will cause a SIGPIPE and m...
What is a domain specific language? Anybody using it? And in what way?
... -- IF (TRUE) ..., Branch -- RETURN
HTML: ... describe a nested structure
TCP/IP: describe to/from addresses
PDF: describe text/image placement on paper
Fonts: describe characters
Any language that we use to describe a specific process is a DSL. Unfortunately there is a lack of domain specific lan...