.NET/ASP.NET/C#/VB.NET PDF Document SDK

You can build the radio button built previously as follows for Internet Explorer: var radioButton = documentcreateElement("<input type='radio' name='radioButton' value='checked'>"); The good news is that it is possible to create a radio button dynamically via JavaScript in Internet Explorer it s just that it s difficult and incompatible with other browsers How can you overcome this limitation The short answer is that some type of browsersniffing mechanism is required so the script knows which method to use when creating the radio button Fortunately, you don t need to check for a multitude of different browsers Assuming only modern browsers are in use, the script needs to differentiate only between Internet Explorer and everything else Internet Explorer recognizes a proprietary attribute of the document object named uniqueID.

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Next we ll quote a function applied to a value. Notice that since we are quoting two items, the result of this quotation is split into two parts. The first part represents the function, and the second represents the value to which it is applied. #light open Microsoft.FSharp.Quotations.Typed let inc x = x + 1 let quotedFun = inc 1 printf "%A\r\n" quotedFun The result is as follows: <@ Prog.inc (Int32 1) @> The next example shows an operator applied to two values. Because the expression has three items, the result is split into three parts, one to represent each part of the expression. #light open Microsoft.FSharp.Quotations.Typed let quotedOp = 1 + 1 printf "%A\r\n" quotedOp The result is as follows: <@ Microsoft.FSharp.Operators.op_Addition (Int32 1) (Int32 1) @> The next example quotes an anonymous function: #light open Microsoft.FSharp.Quotations.Typed let quotedAnonFun = fun x -> x + 1 printf "%A\r\n" quotedAnonFun The result is as follows: <@ fun x#6142.1 -> Microsoft.FSharp.Operators.op_Addition x#6142.1 (Int32 1) @> To interpret expressions, you must first convert them into raw expressions and then query the expression to see whether it is of a certain type. Querying the type returns an option type that will contain the value Some if it is of that type or None if it isn t. The next example defines a

task main (){ SetSensorLowspeed (I2Cport); // Configure NXT port while (true){ // write output data and read back port value I2CBytes(I2Cport, WriteBuf, RdCnt, ReadBuf); // shift left 4 bits and make lowest 4 bits 1 WriteBuf[1] = (ReadBuf[0] << 4) + 0x0f; } } Listing C-3. simon.nxc #define MaxNotes 50 #define ToneDuration 300 #define IntervalDuration 100 #define I2Cport S1 // I2CAddr8574 = 0x40 for PCF8574 // I2CAddr8574 = 0x70 for PCF8574A #define I2CAddr8574 0x40 // Write buffer to send to PCF8574 byte WriteBuf[] = {I2CAddr8574, 0xFF}; // Read buffer that receives byte read from PCF8574 byte ReadBuf[]; // Number of bytes to read int RdCnt=1; // Notes buffer int notes[]; byte LedVal[] = {0xef, 0xdf, 0xbf, 0x7f}; int Tone[] = {TONE_C4, TONE_E4, TONE_G4, TONE_C5}; //******************************************* // Plays a tone and light matching LED. // LED are on higer half of PCF8574 data byte // Parameter is LED number (0..3) void LedTone( int Led) { if(Led < 0 || Led > 3 ) return; WriteBuf[1] = LedVal[Led]; I2CWrite(I2Cport, 0, WriteBuf); PlayTone (Tone[Led], ToneDuration); Wait(ToneDuration); WriteBuf[1] = 0xff; I2CWrite(I2Cport, 0, WriteBuf); Wait(IntervalDuration); }

Internet Explorer is the only browser that recognizes this property, which makes uniqueID a perfect fit for determining whether the browser in which the script is running is Internet Explorer Using the documentuniqueID property to determine the browser in which the script is running, you can combine the Internet Explorer specific method with the standardscompliant method to produce this code: if(documentuniqueID) { //Internet Explorer var radioButton = documentcreateElement("<input type='radio' name='radioButton' value='checked'>"); } else { //Standards Compliant var radioButton = documentcreateElement("input"); radioButtonsetAttribute("type", "radio"); radioButtonsetAttribute("name", "radioButton"); radioButtonsetAttribute("value", "checked"); }.