6. Ruby

  • 6.17. Ruby cycle

    Loops in Ruby are used to execute the same block of code several times. Thissection details all the loop statements su...
    2023-10-26 23:00:07 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 ...
    2023-10-26 23:00:08 UTC
  • 6.19. Ruby block

    You already know how Ruby defines methods and how you call them. Similarly, Ruby has the concept of a block. ...
    2023-10-27 23:00:07 UTC
  • 6.20. Ruby module

    A Module is a way of combining methods, classes, and constants. Modules provide you with two major benefits. ...
    2023-10-26 23:00:07 UTC
  • 6.21. Ruby string

    The String object in Ruby is used to store or manipulate a sequence of one or more bytes. Ruby strings are di...
    2023-10-30 23:00:07 UTC
  • 6.22. Ruby array

    The Ruby array is an ordered integer index collection of any object. Each element in the array is associated with an i...
    2023-10-30 23:00:07 UTC
  • 6.23. Ruby hash

    Hash is similar "key" => "value" such a collection of key-v...
    2023-10-27 23:00:06 UTC
  • 6.24. Ruby date & time

    The Time class is used in Ruby to represent the date and time. It is based on the system date and time provided by the...
    2023-12-11 00:55:05 UTC
  • 6.25. Ruby range

    Ranges (Range) are everywhere: a to z, 0 to 9, and so on. Ruby supports scope and allows us to use scope in different ...
    2023-10-27 23:00:07 UTC
  • 6.26. Ruby iterator

    To put it simply: iterate means doing the same thing over and over again, sothe iterator is used to repeat the same th...
    2023-10-30 23:00:07 UTC
  • 6.28. Ruby File classes and methods

    File represents a connection to a normal file stdio object. ...
    2023-10-31 23:00:07 UTC
  • 6.29. Ruby Dir classes and methods

    Dir is a directory stream that represents a file name in a directory in the operating system. ...
    2023-10-31 23:00:08 UTC
  • 6.30. Ruby exception

    Exceptions and execution are always associated. If you open a file that does not exist and do not handle the situation...
    2023-10-30 23:00:07 UTC
  • 6.31. Ruby object oriented

    Ruby is a pure object-oriented language, and everything in Ruby appears in the form of objects. Every value in Ruby is...
    2023-11-01 23:00:07 UTC
  • 6.32. Ruby regular expression

    A regular expression is a special sequence of characters that matches or finds a collection of strings by using patter...
    2023-10-31 23:00:06 UTC
  • 6.33. Ruby Database access-DBI tutorial

    This section will show you how to access a database using Ruby. Ruby DBI The module provides a database...
    2023-11-01 23:00:07 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.