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Large Array
Hilmar Zonneveld, Independent Consultant
Class for handling arrays. Arrays are not limited to 2 dimensions, or to 65,000 elements. Some additional benefits, for instance, only initialized elements actually use up space. 2003-06-17: Fixed a bug that appeared when saving a value for a second time (MJ). 2002-11-10: Numerous improvements by Martin Jindra.
Created on
21 years ago
Downloads
1050
File type
General information
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LargeArray.zip
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Description
Array class, that allows to store multidimensional arrays (more than 2 dimensions), and isn't limited to 65,000 elements. This latest version includes numerous improvements, by Martin Jindra. I am also including my original class for reference; however, I recommend the improved version. Advantages, over using a regular array: * More than 2 dimensions. * More than 65,000 elements. * There is no need to resize the array - just indicate the number of dimensions when creating the array object. * Allows zero and negative subscripts. * Only initialized array elements actually use up space. Disadvantages: * Slower to access and retrieve than native arrays. * No support for native VFP array functions. * Syntax is different from standard array syntax. Martin Jindra's changes include the following:
  • Speed enhancements (ca. 50% faster).
  • Use of a Session class, if VFP6 or later is used. This required changing from VCX to PRG.
  • Support for NULL values.
  • Methods Save() and Restore() return .T. or .F., indicating success or failure. Also, the following error was fixed: previously, the restored large array was read/only.
  • Error handling (see sample). For a sample, run sample.prg for the original class, or sampleMJ.prg for the improved class.
    Created by
    Hilmar Zonneveld, Independent Consultant
    Hilmar Zonneveld works in programming since 1986, using dBASE, FoxPro and Visual FoxPro. He is available as an independent consultant. He currently works as a programmer at Bata Shoe Organization; also as an instructor at Cisco Networking Academy. You can contact him through the Universal Thread, or, via e-mail, at hilmarz@yahoo.com. Personal Web page (mainly in Spanish): www.geocities.com/hilmarz.

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