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IP multicasting
IP multicasting is used to target a group of hosts by sending a single datagram. IP addresses in the range 224.0.0.0 through 239.255.255.255 are reserved for multicasting. To find out which hosts on...
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Listening to FM radio using RTL-SDR
I am tinkering with an RTL-SDR dongle to listen to FM radio, on a MacBook Pro with OS X Yosemite, and a Windows 8.1 VM running on Parallels Desktop 10. There are several software options available....
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WebSockets with WCF
This post demonstrates an elementary chat service constructed using WCF and WebSockets. A custom binding that leverages WebSocket support in httpTransport is used. JSON is serialized and deserialized...
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Doing away with labels for text fields
The following code example does away with labels for text fields. A custom attribute called data-default-value contains the default value to which a text field gets initialized. That value represents...
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JSON-RPC
If your HTML5 application requires RPC (remote procedure call) semantics, JSON-RPC is an easy specification to implement. The code below allows sending requests and receiving responses, and leverages...
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Manipulating JSON using Json.NET
Json.NET makes it convenient to manipulate JSON in C# using dynamic programming. Let’s start with a JSON representation we want to create { "menu": { "id": "file", "value": "File", "popup": {...
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Make things smart with HomeKit and Raspberry Pi
As an avid iOS user I have been keen on using HomeKit. That’s when I read about a new – and currently free – HomeKit app in the iOS App Store called Hesperus. I don’t have a HomeKit compatible thing at...
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Run Node.js in a Docker container
In this post, I explore how to run a Node.js web application in a Docker container based on the StrongLoop Process Manager image. I also have a requirement to export and deploy the Docker container to...
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Join multi-user chat with node-xmpp-client
XEP-0045 defines the XMPP protocol extensions required to join multi-user chat rooms, and receive and post messages. In this post, I use the node-xmpp-client library to join a multi-user chat room....
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JSON syntax highlighting in ScintillaNET
I am studying the excellent ScintillaNET code editing component, to enable basic JSON editing in a .NET application. Inspired by the C# code highlighting example, here’s the code snippet to enable...
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