6. Ruby

  • 6.1. Ruby tutorial

    Ruby is an open source server-side scripting language for object-oriented programming, designed and developed by Matsum...
    2025-10-25 13:33:58 UTC
  • 6.3. Ruby environment

    6.3.1. Local environment settings # If you want to set up the environment for the Ruby programming language, please r...
    2025-10-25 13:34:02 UTC
  • 6.4. Ruby installation-Linux

    The steps for installing Ruby on a Linux machine are listed below. Note: before installing, make sure you have root permis...
    2025-10-25 13:34:05 UTC
  • 6.5. Ruby installation-Windows

    The steps for installing Ruby on a Windows machine are listed below. Note: you may have different versions available durin...
    2025-10-25 13:33:59 UTC
  • 6.6. Ruby Chinese coding

    In the previous section, we have learned how to use Ruby to output “Hello, World!”. There is no problem with English, but if...
    2025-10-25 13:34:06 UTC
  • 6.7. Ruby command line options

    Ruby is typically run from the command line as follows: $ ruby [ options ] [.] [ programfile ] [ arguments ... ] The ...
    2025-10-25 13:34:03 UTC
  • 6.8. Ruby environment variable

    The Ruby interpreter uses the following environment variables to control its behavior. The ENV object contains a list of all...
    2025-10-25 13:34:03 UTC
  • 6.9. Ruby syntax

    Let’s write a simple Ruby program. All Ruby file extensions are .rb . so, put the following source code in test.rb i...
    2025-10-25 13:34:02 UTC
  • 6.10. Ruby data type

    In this section, we will introduce you to the basic data types of Ruby. The data types supported by Ruby include basic Num...
    2025-10-25 13:33:58 UTC
  • 6.11. Ruby classes and objects

    Ruby is a perfect object-oriented programming language. Features of an object-oriented programming language include: Dat...
    2025-10-25 13:34:04 UTC
  • 6.12. Ruby class case

    The following will create a file named Customer to declare two methods:the Ruby class: display_details :This met...
    2025-10-25 13:34:03 UTC
  • 6.13. Ruby variable

    A variable is a storage location that holds any data that can be used by anyprogram. Ruby supports five types of variables...
    2025-10-25 13:34:00 UTC
  • 6.14. Ruby operator

    Ruby supports a rich set of operators. Most operators are actually method calls. For example, a + b are interpreted ...
    2025-10-25 13:33:59 UTC
  • 6.15. Ruby comment

    Comments are comment lines within Ruby code that are ignored at run time. A single-line comment begins with the # character ...
    2025-10-25 13:34:05 UTC
  • 6.17. Ruby cycle

    Loops in Ruby are used to execute the same block of code several times. Thissection details all the loop statements supporte...
    2025-10-25 13:34:00 UTC
  • 6.18. Ruby method

    The Ruby method is similar to functions in other programming languages. The Ruby method is used to bundle one or more duplic...
    2025-10-25 13:34:04 UTC

Principles, Technologies, and Methods of Geographic Information Systems

 102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.