ASP.NET Web PDF Document Viewer/Editor Control Library

documentgetElementById("trackFlag")checked = false; } function updateStockQuote() { var ajaxRequest = new AjaxRequest("UpdateStockQuote"); ajaxRequestaddFormElementsById("stockTickers"); ajaxRequestsendRequest(); } function startUpdateStockQuoteInterval() { stockTickerUpdateIntervalID = windowsetInterval("updateStockQuote()", 30000); } function handleTrackFlagClick() { var trackFlag = documentgetElementById("trackFlag"); if(trackFlagchecked) { updateStockQuote(); startUpdateStockQuoteInterval(); } else { clearStockTickerUpdateInterval(); } } At the top of the file is a global variable named stockTickerUpdateIntervalID This variable holds the unique ID of the interval that updates the stock quotes It is initialized to zero The automatic refresh is disabled whenever the user edits the contents of the text box that holds the desired stock tickers The handleStockTickersChange function is called whenever the onkeyup event for the text box fires The handleStockTickersChange function calls the clearStockTickerUpdateInterval function, which uses the stockTickerUpdateIntervalID to clear the interval and thus stop the automatic refreshing of the stock quotes.

barcode add in for excel 2016, download barcode macro for excel, barcode software for excel free download, barcode formula for excel 2007, how to barcode in excel 2010, barcode in excel 2003 erstellen, 2d barcode excel 2013, how to add barcode font to excel 2003, how to convert to barcode in excel 2010, free barcode generator excel 2007,

Obviously, some of these links are a little long to type, so I ve summarized them all at http://strangelights.com/FSharp/Foundations/default.aspx/FSharpFoundations.Downloads where I ll keep them updated.

The use of the spare connection point can be seen in this Temperature Sensor (described in 5) shown in Figure 3-24.

Summary

The check box is then unchecked to indicate to the user that the automatic refreshing has been temporarily disabled The updateStockQuote function is the function that actually performs the Ajax request Like the previous examples from this chapter, it uses the Taconite JavaScript client to do the dirty work of creating the XMLHttpRequest object, adding the desired parameters to the query string, and sending the request The startUpdateStockQuoteInterval function uses the windowsetInterval method to start automatic refreshing of the stock quotes The first parameter in the call to windowsetInterval is a string representing the startUpdateStockQuoteInterval function, and the second parameter is an integer representing the time delay, in milliseconds, between calls to the specified function Notice how the windowsetInterval method returns a unique ID of this particular interval, which is stored in the stockTickerUpdateIntervalID variable that is used later when clearing the interval.

Contact sensors are the simplest NXT sensors because they re only on or off. The LEGO Touch Sensor is a good example of a contact sensor. Homebrew contact sensors use the same NXT-G Touch Sensor block shown in Figure 4-1 as the LEGO ones. You probably already have everything you need to homebrew one. Even if you don t, the parts are readily available from electronic stores such as Radio Shack, and even from hardware stores.

This chapter described how to install and run F# and the different ways you can work with it. The following chapters will explain how to program with F#, starting in 3 with functional programming in F#.

ou saw in 1 that pure functional programming treats functions as values, relies on recursion for looping, and does not allow changes to state. In this chapter, you ll survey the major language constructs of F# that support the functional programming paradigm.

Finally, the handleTrackFlagClick function handles the check box s onclick event If the check box becomes checked, it immediately refreshes the stock quotes by calling the updateStockQuote function, and then it initiates the automatic refreshing by calling the.

Figure 4-1. NXT-G Touch Sensor block We ve already covered many methods for connecting to the NXT sensor inputs in 3. For contact sensors, we re interested in only two of the six possible connections. On the NXT plug, they re pins 1 and 2, and in the cable they re the black and white wires. For now, it doesn t even matter which is which. In the examples that follow, we ll show only some 18 gauge (0.8mm2) speaker wires, and you can presume they re attached to these two NXT connections.