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// Use Average() with the query syntax. using System; using System.Linq; class ExtMethods2 { static void Main() { int[] nums = { 1, 2, 4, 8, 6, 9, 10, 3, 6, 7 };

Focus Features:

Always wear safety goggles and a lab apron. Use care around flames. Secure loose clothing and tie back long hair. Never place the pipettes in your mouth.

#include <iostream> using namespace std; void code(const char *str); int main() { code("this is a test"); return 0;

A nullable type is a special version of a value type that is represented by a structure. In addition to the values defined by the underlying type, a nullable type can also store the value null. Thus, a nullable type has the same range and characteristics as its underlying type. It simply adds the ability to represent a value that indicates that a variable of that type is unassigned. Nullable types are objects of System.Nullable<T>, where T must be a nonnullable value type.

Exceptions Generated by GetResponseStream( )

background is deleted via the Objects docker, and you use File | Save As, and PNG is fine in this example for a single-layer image with transparency. Figure 27-8 shows an example layout featuring the now trimmed and exported scarecrow against a field of corn with a similarly corny headline. Therefore, you re only a few hours worth of practice and only five PHOTO-PAINT steps away from the ability to compose bitmap and vector scenes such as this one when you ve set up your photography with the right solid background color.

9. Consider the circuit shown in Fig. 13-1. Suppose that instead the inductance is 4 H and the initial current is i(0) = 3 A. Find the zero-state and the zero-input responses as functions of time. 10. Consider the series RLC circuit shown in Fig. 13-2 and let R = 4, L = 2, C = 1/2. Suppose that the input voltage is v i (t) = cos 2t and that the initial current is zero. Find the current i(t) by using Laplace transform methods. 11. Use the convolution theorem to solve f (t) = 2 cos t

Part I:

3. Click Next, and then click Some registry entries. 4. Click Add. Then, in the Choose Registry Entry dialog box, from the Hive list, click HKEY_LOCAL_MACHINE. 5. In the Key field, type Software\Citrix\IMA, and then click OK. 6. Click Next, and then Finish. 7. Click OK to close the dialog box.

Flush-Mounted If you want a phone jack installed that is flush to the wall, it is possible, albeit a little more complicated. The complication doesn t arise in any new sort of wiring scheme. Rather, it has to do with the placement of wire within your home s walls, as opposed to running them along the floors. Follow these steps to install a flush-mounted phone jack:

Battery reserve capacity: the number of minutes a new fully charged battery at 80 F (26.7 C) can be continuously discharged at 25 amperes and maintain a voltage of 1.75 volts or higher per cell (10.5 volts for a 12-volt battery or 5.25 volts for a 6-volt battery). Bleeder resistor: a resistor in the output of a power supply that removes the output voltage after the power supply is turned off. Blocking diode: a diode that allows the charging of multiple batteries from a single source without allowing current ow between the batteries. Bonding: the electrical connection of the exposed, metallic, non-current-carrying parts to the ground (negative) side of the direct current system. Bonding conductor: a normally non-current-carrying conductor used to connect the non-current-carrying metal parts of direct current devices on the boat to the boat s bonding system. Branch: a current path in a circuit. Bulk charge: the stage of battery charging usually de ned between 50% and 75 to 80% of battery capacity. Bus bar: a heavy copper bar or strap in circuit panel boxes carrying current to all of the terminals. Capacitance: the electrical size of a capacitor in farads. Equal to the amount of charge stored divided by the voltage across the capacitor. Capacitor: a device that stores electrostatic charge when a voltage is applied. Cathode: the electrode of an electrochemical cell with the more positive potential. The more noble metal of an electrochemical cell that tends not to corrode. Cathodic bonding: the electrical interconnection of metal objects in common contact with water, to the engine negative terminal, or its bus, and to the source of cathodic protection. Cathodic disbondment: the destruction of adhesion between a coating and its substrate by products of a cathodic reaction. Cathodic protection: reduction or prevention of corrosion of a metal by making it cathodic by the use of sacri cial anodes or impressed currents. Cell: the smallest unit of a battery. Also an electrochemical system consisting of an anode and a cathode immersed in an electrolyte. The anode and cathode may be separate metals or dissimilar areas on the same metal. The cell includes the external circuit that permits the ow of electrons between the anode and the cathode. Chassis: the metal structure that supports the circuits and components of a piece of electronic equipment. Choke: an inductor placed in series in a circuit to oppose changes in current. Circuit: a complete electrical path from one terminal to the other of a voltage source.

As you can see, the count still proceeds normally. However, notice the summation value for 5. It shows 21 instead of 15! The reason for this is that sum is captured by ctObj when it is created by the Counter( ) method. This means it remains in existence until count is subject to garbage collection at the end of the program. Thus, its value is not destroyed when Counter( ) returns or with each call to the anonymous method when count is called in Main( ). Although captured variables can result in rather counterintuitive situations, such as the one just shown, it makes sense if you think about it a bit. The key point is that when an anonymous method captures a variable, that variable cannot go out of existence until the delegate that captures it is no longer being used. If this were not the case, then the captured variable could be undefined when it is needed by the delegate.

// Overload & for short-circuit evaluation. public static ThreeD operator &(ThreeD op1, ThreeD op2) { if( ((op1.x != 0) && (op1.y != 0) && (op1.z != 0)) & ((op2.x != 0) && (op2.y != 0) && (op2.z != 0)) ) return new ThreeD(1, 1, 1); else return new ThreeD(0, 0, 0); } // Overload !. public static bool operator !(ThreeD op) { if(op) return false; else return true; } // Overload true. public static bool operator true(ThreeD op) { if((op.x != 0) || (op.y != 0) || (op.z != 0)) return true; // at least one coordinate is non-zero else return false; } // Overload false. public static bool operator false(ThreeD op) { if((op.x == 0) && (op.y == 0) && (op.z == 0)) return true; // all coordinates are zero else return false; } // Show X, Y, Z coordinates. public void Show() { Console.WriteLine(x + ", " + y + ", " + z); } } class LogicalOpDemo { static void Main() { ThreeD a = new ThreeD(5, 6, 7); ThreeD b = new ThreeD(10, 10, 10); ThreeD c = new ThreeD(0, 0, 0); Console.Write("Here is a: "); a.Show(); Console.Write("Here is b: "); b.Show(); Console.Write("Here is c: "); c.Show(); Console.WriteLine();

Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.

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FIGURE 12.12. Maximum windup ratio bm versus h with Qm as varying parameter open-track (cycloidal cam).