Archive for March, 2010

ASCII Codes + HTML Codes and Special Characters

The table describes Standard ASCII set, HTML Entity names, ISO 10646, ISO 8879, HTML 4.01 and Latin extended A and B codes and special characters

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How to: Define a Namespace in VB.NET

A namespace designates a collection of programming elements, organized and classed for grouping operations and easy access. At the namespace level, the programming elements include:

  • Classes of objects [...];
  • Structures [...];
  • Modules [...];
  • Interfaces [...];
  • Delegates [...];
  • Enumeration [...];
  • Other namespaces.

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How to: Define and Use a Structure in VB.NET

The structure is a programming entity similar to classes [...]. The difference is that structures are value types while classes of objects are reference types.
A value type variable is declared and the space according to said data type is allocated at the execution time. Value type variable is destroyed when leaving the block where it has been defined.
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Librarie de functii si proceduri pentru lucru cu matrici (masive bidimensionale) in limbajul C si C++ – Diferite prelucrari

Functiile de prelucrare in matrice sunt acele functii care fac diferite operatii matematice, operatii de interschimbare, numarare, modificare, stergere, inlocuire asupra elementelor unei matrice modificând-o in cele mai multe cazuri.

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C and C++ library of functions and procedures for matrix (bidimensional arrays) – Comparison functions

The comparison functions used for matrix processing are needed for finding more information about a matrix or group of matrices from the point of view of: the matrix type, its elements type or the apparition number of a key in the matrix.

The function symmet checks if a matrix is a square or a symmetrical one. It gets as entry parameters the matrix’ lines and columns numbers, which are n and m, and the matrix X. The matrix is defined static. The function returns the address of an integer variable, *er, where it writes 1 if the matrix is symmetrical or 0 if the matrix isn’t symmetrical. Also it verifies if the matrix is a square one and it writes 0 at the integer variable’ address if the condition isn’t fulfilled.
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How to: Implement Interfaces in VB.NET

Implementing an interface in VB.NET is done by specification Implements. Interfaces can be implemented by classes [...] and structures [...]. A class or structure can implement one or more interfaces, separated by the operator , in VB.NET.
List of interfaces implemented by class/structure is given by their associated names at defining time [...].
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How to: Define Interfaces in VB.NET

The interface is a set of definitions of properties, methods and events. Unlike classes [...], interfaces do not contain the implementation. Interfaces are implemented [...] by classes, but are defined as separate entities.
A class that implement an interface must implement all elements defined in that interface.
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Librarie de functii si proceduri pentru lucru cu matrici (masive bidimensionale) in limbajul C si C++ – Functii de comparare

Functiile de comparare a matricelor sunt folosite cu scopul de afla informatii despre o matrice sau un set de matrice din punctul de vedere al tipului unei matrice, a tipului elementelor ce o compun sau a numarului de aparitii in cadrul acelei matrice al unei chei definite de utilizator.

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C and C++ library of functions and procedures for matrix (bidimensional arrays) – Mathematical functions

Other posts on this topic:

The mathematical functions uses the matrices as operands in different math operations. The operations with matrices described in this chapter are adding, multiplying, transposing, subtracting and inverting. Also here are some arithmetical operations with linear matrices like adding, subtracting, multiplying and transposing. For example, two linear matrices sum is obtained after transforming the matrices in one-dimensional arrays and adding them. In the same way are done the others operations.

In this post are described the functions that are doing those computations. Both variants of defining a matrix, the static method and the dynamic one, are used. Read the rest of this entry »

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How to: Transmit the Message Assigned to an Event Defined in VB.NET

Appearance of an event and transmission of its message is accomplished by specification RaiseEvent.
Specification RaiseEvent is used only for events declared explicitly.
Use RaiseEvent specification is exemplified in the following source code sequence developed in VB.NET:
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