Nala Ginrut writes: > It's an interesting topic. Although I planed to share something when I earn > more money, now that someone raised it... :-)
:) > Here I give you two real cases. > > The first one is that we use Guile to send command from UART to control a > small robot. We made it in a sponsored hackathon. And earned the highest > award in couple of hours, about $1500 (10,000 Chinese yuan). People never > saw such a project, as the journalist wrote: "they ask the robot to write > just 3 Chinese characters and get 10,000 yuan." > It's an interesting story, I will write it in my blog. I wrote the > prototype in Guile, but the hackathon day I have to go to church, and my > friends encoutered problems, then someone have to rewrite it in Forth, or > we may lost the chance in time. But the name of the project is > lambda-tortoise, since it's in Scheme originally. Of course it's free > project, and yes I wrote a thing to let Guile control serial port. But I > haven't gotten time to release it. > Here is the media report: > http://m.leiphone.com/news/201510/Hk7mizNbynrIInam.html Cool! I can’t really read the page, but Google translation gives a rough idea if the content. > The second case is that I wrote a complete video multicasting system for a > primary school. It's a serious business project, I spent lot of time to > debug and deploy. The priciple is not complicated, there's server-side > written in GNU Artanis (of course it's pure Guile Scheme) provided RESTful > APIs, and more than 50 raspberryPI as client nodes (running some scripts to > interact with the server), each node control a TV set. The operator could > control nodes in groups, or monitor heartbeat, and even give command to it > (shutdown or replay certain video). > The old solution is very expensive for the school, and can not be scalable. > I use Artanis for quick develop, and raspberryPI is cheap. So I helped them > to solve the scalability problem, now if they want to add new node, just > buy a raspberryPI, and flash a card with a customized system, connect to > network, plug to the TV set, and just power it, it'll be recognized by > server and push the latest video list. Very easy for them. > Besides, my server is faster then their old solution which runs on Windows > with dot net. They surprised that how my server can be so fast to upload 1G > video in few seconds. And I surprised too, how can they endure such > performance these years, 200M video they have to wait 10 minutes. > For such a result all beyond their expectation. I get well paid, consider I > just spent two days for programming(more time spent on debug and deploy), I > think it's efficient to develop with Guile. That sounds great! > Well, I can't reveal how much money for this project. But it's far more > than the number of the award I mentioned in the first case. > And unfortunately, they bought all the code, so I can't free it to you. I > really want to persuade them to free it to make this project as a perfect > case of free software. But it's high customized system to meet their > specific need. They don't want to reveal it for many reasons. > > Anyway, Artanis become stronger after this real business project. I think > it's the most important. This is something which would fit really well as a user story on the Artanis web page. It would be ideal if you could get a quote from a principal of the School how much your work improved their situation. > And I have to say frankly, I can earn the money is not because I use Guile, > but because I know how to solve the problem. Although the ability of > solving problem is unrelated to the language, it's good for you to choose a > good language for better develop experiences. > Guile is a practical one in Scheme world. To my experience, Scheme is > flexible enough when your code base increase, that is to say, you > don't have to refactor frequently to meet your new needs, all the old > part are easy to intergrate with your new code. And this paragraph should in one way or another be on the Guile Website. > For an Object-Oriented user, this may not surprise, but what if you > drop your heavy object system and do the job in a light way? > > I think I'm the only one who refuse OO (yes, extreamly intended) in Scheme > programming. I just want to see, to what extent, we may drop OO for same > purpose in Scheme. OK, I confess I'm cheating, since I use the inheritance > in record-type in r6rs. But it's the only cheating. :-) :) Thank you for sharing your experience here! Best wishes, Arne -- Unpolitisch sein heißt politisch sein ohne es zu merken
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