March 2007
Intermediate to advanced
623 pages
16h 47m
English
Content preview from Professional Ajax, 2nd Edition
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12.2. Watching Stocks
Nothing changed the stock market quite like the Web. What used to be the domain of financial experts has become something that the everyman can now take part in. Online trading companies like E*Trade have changed the face of stock trading forever. Regardless of this change, the Web is first, and foremost, a vast repository of information, and stock price information is no exception.
12.2.1. Getting Yahoo! Finance Information
While not as feature filled as some Yahoo! premium services, basic stock reporting with Yahoo! Finance can easily be used in any Web application. The 15-minute delay certainly isn't desirable for anyone wanting up-to-the-second information, but this free service could satisfy anyone who wants to casually watch certain stocks during the day.
Yahoo! Finance stock information comes in comma-separated value (CSV) format, and you use the following URL to download information on any stock:
http://finance.yahoo.com/d/quotes.csv?s=stock_symbols&f=special_tags
Stock symbols should be separated by a plus sign (+). There's a host of information available for each individual stock, and you can specify what pieces of information you want with special tags. For example, the URL to get the day's opening price and the last trade's price for Microsoft's and GE's stock would look like this:
http://finance.yahoo.com/d/quotes.csv?s=MSFT+GE&f=ol1
For a complete list of available tags, visit www.gummy-stuff.org/Yahoo-data.htm.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.