24.04.2008, 20:19 | #1 |
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dax-lessons: Weather forecasting using X++
Источник: http://DAX-Lessons.spaces.live.com/B...FCD1!146.entry
============== In todays competitive business world, there are many factors which determine the profit or loss. Climatic conditions has its own impact and is becoming increasingly important for the corporates. Like Demand forecast, weather forecast can be very helpful in business planning. This Job is an attempt to predict the weather conditions in advance and organize things in such a way which will help the companies not only to optimize their resources but also maximize their profits. In the example, I used Yahoo released rss weather feeds: http://weather.yahoo.com/rss and XML programming to get the climatic conditions The format of the URL for the feed is: http://xml.weather.yahoo.com/forecastrss?p=USNY0996&u=f p is a US zip or a Yahoo! Weather location ID u is the temp. units. ‘F’ for Fahrenheit (default) and ‘C’ for celcius static void weatherForecast(Args _args) { XmlDocument doc = newXmlDocument(); XmlNamespaceManager ns; XmlNodeList nodes; XmlNode node; //AddressZipCode addresszipCode; container day(str _day) { ; switch(_day) { case 'Mon' : return [1,'Monday']; case 'Tue' : return [2,'Tuesday']; case 'Wed' : return [3,'Wednesday']; case 'Thu' : return [4,'Thursday']; case 'Fri' : return [5,'Friday']; case 'Sat' : return [6,'Saturday']; case 'Sun' : return [7,'Sunday']; Default : return connull(); } } ; //addresszipCode = _args.record(); doc.Load("http://xml.weather.yahoo.com/forecastrss?p=UKXX0085&u=c" );// +addresszipCode.ZipCode +’&u=c’); // Setup namespace manager for XPath ns =new XmlNamespaceManager(doc.nameTable()); ns.AddNamespace("yweather", "http://xml.weather.yahoo.com/ns/rss/1.0"); // Getforecast with XPath nodes= doc.SelectNodes("//rss/channel/item/yweather:forecast", ns); node =nodes.nextNode(); setprefix("Weather forecast"); while(node) { info("-----------------------------------------------------"); info(conpeek(day(node.attributes().getNamedItem("day").InnerText()),2)); info("-----------------------------------------------------"); info( node.attributes().getNamedItem("text").InnerText()); info('Min :' +node.attributes().getNamedItem("low").InnerText()); info('Max :' +node.attributes().getNamedItem("high").InnerText()); if(dayofwk(today()) ==conpeek(day(node.attributes().getNamedItem("day").InnerText()),1)) { info('Current :' +node.attributes().getNamedItem("code").InnerText()); } else { info('Current : NA'); } node = nodes.nextNode(); } } Note: 1) An essential pre-requisite for the code to work is the URL should not be blocked by the firewall. 2)We can directly use this job as an menuitemaction button by adding the job in menuitems under actions, Then add the button in the AddressZipcode form , for that make use of the commented code of AddressZipcode in the above Job. Here are some example location IDs (do not include the city name) or use the existing Zipcodes of AX
" Don't bother about weather" Источник: http://DAX-Lessons.spaces.live.com/B...FCD1!146.entry
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24.04.2008, 23:13 | #2 |
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Цитата:
Сообщение от Blog bot
X++: container day(str _day) { ; switch(_day) { case 'Mon' : return [1,'Monday']; case 'Tue' : return [2,'Tuesday']; case 'Wed' : return [3,'Wednesday']; case 'Thu' : return [4,'Thursday']; case 'Fri' : return [5,'Friday']; case 'Sat' : return [6,'Saturday']; case 'Sun' : return [7,'Sunday']; Default : return connull(); } И вдобавок наверняка американец или англичанин - для него других языков просто не сущесвует Скорее англичанин, раз неделя у него жестко начинается с понедельника И кто бы объяснил, зачем он в контейнер упаковывает, если потом все равно только номером пользуется?... И зачем он постоянно лишний вызов через точку делает? node.attributes() Он надеется на оптимизатор, которого нет? |
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25.04.2008, 12:00 | #3 |
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Цитата:
X++: days = ['Mon', 'Tue', ....] ... conFind(days, _day) Цитата:
И вдобавок наверняка американец или англичанин - для него других языков просто не сущесвует Скорее англичанин, раз неделя у него жестко начинается с понедельника Цитата:
И зачем он постоянно лишний вызов через точку делает? node.attributes()
Он надеется на оптимизатор, которого нет? |
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