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In my last few articles about Erlang we've covered the basics of network programming with gen_tcp and Erlang/OTP's gen_server, or generic server, module. Let's combine the two. In most people's minds "server" means network server, but Erlang uses the terminology in the most abstract sense. gen_server is really a server that operates using Erlang's message passing as its base protocol. We can graft
One of the benefits of working with Erlang is that it was designed with real-world applications in mind. This is reflected in OTP, or Open Telecommunications Platform, a set of standard libraries that come with the default Erlang VM. Erlang/OTP implements in a generic way lots of networking paradigms, including finite state machines (gen_fsm), event handling (gen_event), and client/server interact
Dynamic programming is a method for efficiently solving a broad range of search and optimization problems which exhibit the characteristics of overlappling subproblems and optimal substructure. I'll try to illustrate these characteristics through some simple examples and end with an exercise. Happy coding! Contents Overlapping Subproblems Optimal Substructure The Knapsack Problem Everyday Dynamic
Ruby / EventMachine is an event-driven networking library for Ruby, similar to Twisted for Python. Certain aspects of it are also similar to Erlang/OTP's gen_server module. Why EventMachine? EventMachine satisfies two key requirements. First, because EventMachine is an implementation of the reactor pattern, it separates networking logic from application logic. This means you don't have to worry
Description TabbedPane.js is a short (20-line) JavaScript class that allows the creation of a dynamic AJAX tab interface. The controls and viewport are arbitrary, so it can be used to implement other interfaces, too. I designed it with simplicity and flexibility in mind. Other dynamic ajax tab scripts tend to either include everything and then some or make design decisions. TabbedPane does neith
Justin Silverton at Jaslabs has a supposed list of 10 tips for optimizing MySQL queries. I couldn't read this and let it stand because this list is really, really bad. Some guy named Mike noted this, too. So in this entry I'll do two things: first, I'll explain why his list is bad; second, I'll present my own list which, hopefully, is much better. Onward, intrepid readers! Why That List Sucks He
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