Easy way to fetch stock quotes from Yahoo Finance using YQL

stock_quotes.html

AAPL: $<span class="stock-quote" data-value="AAPL"></span>
<br/>
MSFT: $<span class="stock-quote" data-value="MSFT"></span>
<br/>
GE: $<span class="stock-quote" data-value="GE"></span>

stock_quotes.js

(function($) {

    var getStockQuotesQuery = function(tickers) {
        return "select * from yahoo.finance.quotes" + " where symbol IN ('" + tickers.join("', '") + "')";
    };

    var processStockQuotesResponse = function(response) {
        var quotes = {};

        if (!$.isArray(response.query.results.quote)) response.query.results.quote = [response.query.results.quote];

        $.each(response.query.results.quote, function(index, quote) {
            quotes[quote.symbol] = quote;
        });
        return quotes;
    };

    var getStockQuotes = function(tickers) {
        var url = 'http://query.yahooapis.com/v1/public/yql';
        var d = $.Deferred();

        $.ajax({
            dataType: 'jsonp',
            type: 'GET',
            url: url,
            data: {
                q: getStockQuotesQuery(tickers),
                env: 'store://datatables.org/alltableswithkeys',
                format: 'json'
            },
            success: function(response) {
                var quotes = processStockQuotesResponse(response);
                d.resolve(quotes);
            },
            failure: function(response) {
                d.reject();
            }
        });

        return d;
    }

    window.getStockQuotes = getStockQuotes;

})(jQuery);

(function($) {
    var stockSymbolsOnPage = function() {
        var symbols = [];
        $('.stock-quote').each(function() {
            var value = $(this).data('value');
            var symbol = value.split('.')[0];
            symbols.push(symbol);
        });
        return symbols;
    };

    var stockQuotesOnPage = function() {
        return getStockQuotes(stockSymbolsOnPage());
    };

    var updateStockQuoteForElement = function(element, quotes) {
        var value = $(element).data('value');
        var symbol = value.split('.')[0];
        var property = value.split('.')[1] || 'AskRealtime';
        $(element).text(quotes[symbol][property]);
    };

    var updateStockQuotesOnPage = function(quotes) {
        console.log(quotes);
        $('.stock-quote').each(function() {
            updateStockQuoteForElement(this, quotes);
        });
    };

    var refreshStockQuotesOnPage = function() {
        $.when(stockQuotesOnPage()).then(function(quotes) {
            updateStockQuotesOnPage(quotes);
        });
    };

    window.refreshStockQuotesOnPage = refreshStockQuotesOnPage;
})(jQuery);

jQuery(function($) {
    var refreshTimeInSeconds = 60;

    setInterval(refreshStockQuotesOnPage, refreshTimeInSeconds * 1000);
    refreshStockQuotesOnPage();
});​