C# 4.0 Pocket Reference: Instant Help for C# 4.0 Programmers by Ben Albahari, Joseph Albahari

By Ben Albahari, Joseph Albahari

When you are programming C# 4.0 and want a bit support, this tightly concentrated and sensible booklet tells you precisely what you must be aware of -- with no lengthy introductions or bloated examples. it is perfect as a succinct quickly reference or as a advisor to get you quickly in control in the event you already understand Java, C++, or an previous model of C#.

Written via the authors of the acclaimed C# 4.0 in a Nutshell (O’Reilly), this ebook covers the whole C# 4.0 language -- with out skimping at the info -- together with:

  • Features new to C# 4.0, equivalent to dynamic binding, not obligatory and named parameters, and kind parameter variance
  • All of C#'s basics
  • Advanced subject matters, together with operator overloading, customized conversions, kind constraints, covariance and contravariance, lambda expressions and closures, iterators, nullable varieties, and operator lifting
  • LINQ, beginning with sequences, lazy execution, and traditional question operators; completing with a whole connection with question expressions
  • Unsafe code and guidelines, customized attributes, preprocessor directives, and XML documentation

Show description

By Ben Albahari, Joseph Albahari

When you are programming C# 4.0 and want a bit support, this tightly concentrated and sensible booklet tells you precisely what you must be aware of -- with no lengthy introductions or bloated examples. it is perfect as a succinct quickly reference or as a advisor to get you quickly in control in the event you already understand Java, C++, or an previous model of C#.

Written via the authors of the acclaimed C# 4.0 in a Nutshell (O’Reilly), this ebook covers the whole C# 4.0 language -- with out skimping at the info -- together with:

  • Features new to C# 4.0, equivalent to dynamic binding, not obligatory and named parameters, and kind parameter variance
  • All of C#'s basics
  • Advanced subject matters, together with operator overloading, customized conversions, kind constraints, covariance and contravariance, lambda expressions and closures, iterators, nullable varieties, and operator lifting
  • LINQ, beginning with sequences, lazy execution, and traditional question operators; completing with a whole connection with question expressions
  • Unsafe code and guidelines, customized attributes, preprocessor directives, and XML documentation

Show description

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Sample text

Variables and Parameters A variable represents a storage location that has a modifiable value. A variable can be a local variable, parameter (value, ref, or out), field (instance or static), or array element. The Stack and the Heap The stack and the heap are the places where variables and constants reside. Each has very different lifetime semantics. Stack The stack is a block of memory for storing local variables and parameters. The stack logically grows and shrinks as a function is entered and exited.

A variable can be a local variable, parameter (value, ref, or out), field (instance or static), or array element. The Stack and the Heap The stack and the heap are the places where variables and constants reside. Each has very different lifetime semantics. Stack The stack is a block of memory for storing local variables and parameters. The stack logically grows and shrinks as a function is entered and exited. Consider the following method (to avoid distraction, input argument checking is ignored): static int Factorial (int x) { if (x == 0) return 1; return x * Factorial (x−1); } This method is recursive, meaning that it calls itself.

To make this compile, we must add an explicit cast: short z = (short) (x + y); // OK Special Float and Double Values Unlike integral types, floating-point types have values that certain operations treat specially. 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.

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