Joseph Albahari's C# 5.0 Pocket Reference: Instant Help for C# 5.0 Programmers PDF
By Joseph Albahari
When you wish solutions for programming with C# 5.0, this useful and tightly centred e-book tells you precisely what you must know—without lengthy introductions or bloated samples. effortless to browse, it’s perfect as quickly reference or as a advisor to get you swiftly in control when you already recognize Java, C++, or an past model of C#.
Written via the authors of C# 5.0 in a Nutshell, this ebook covers the total C# 5.0 language, including:
- All of C#’s basics
- Advanced subject matters comparable to operator overloading, style constraints, covariance & contravariance, iterators, nullable kinds, operator lifting, lambda expressions & closures
- LINQ, beginning with sequences, lazy execution and traditional question operators, and completing with an entire connection with question expressions
- Dynamic binding and C# 5.0’s new asynchronous features
- Unsafe code & tips, customized attributes, preprocessor directives, and XML documentation
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Extra info for C# 5.0 Pocket Reference: Instant Help for C# 5.0 Programmers
We can call this supplying only a value for d as follows: Bar (d:3); This is particularly useful when calling COM APIs. var—Implicitly Typed Local Variables It is often the case that you declare and initialize a variable in one step. If the compiler is able to infer the type from the initialization expression, you can use the word var in place of the type declaration. PI; Because of this direct equivalence, implicitly typed variables are statically typed. For example, the following generates a compile-time error: var x = 5; x = "hello"; // Compile-time error; x is of type int In the section “Anonymous Types” on page 141, we describe a scenario where the use of var is mandatory.
The simplest kinds of expressions are constants (such as 123) and variables (such Expressions and Operators | 43 as x). Expressions can be transformed and combined using operators. An operator takes one or more input operands to output a new expression: 12 * 30 // * is an operator; 12 and 30 are operands. Complex expressions can be built because an operand may itself be an expression, such as the operand (12 * 30) in the following example: 1 + (12 * 30) Operators in C# can be classed as unary, binary, or ternary— depending on the number of operands they work on (one, two, or three).
These special values are NaN (Not a Number), +∞, –∞, and –0. The float and double classes have constants for NaN, +∞, and –∞ (as well as other values including MaxValue, MinValue, and Epsilon). 0)); // // NaN NaN When using ==, a NaN value is never equal to another value, even another NaN value. NaN); double Versus decimal For scientific computations (such as computing spatial coordinates), double is useful. decimal is useful for financial computations and values that are “man-made” rather than the result of real-world measurements.
C# 5.0 Pocket Reference: Instant Help for C# 5.0 Programmers by Joseph Albahari