6. Ruby

  • 6.1. Ruby tutorial

    Ruby is an open source server-side scripting language for object-oriented programming, designed and...
    2023-10-23 23:00:07 UTC

  • 6.2. Ruby introduction

    Ruby is a pure object-oriented programming language. It was founded in 1993 by Hakuhiro Matsumoto of Japan (Matsumoto ...
    2023-10-24 23:00:07 UTC

  • 6.3. Ruby environment

    6.3.1. Local environment settings # If you want to set up the environme...
    2023-10-23 23:00:07 UTC

  • 6.4. Ruby installation-Linux

    The steps for installing Ruby on a Linux machine are listed below. Note: before installing, make sure you hav...
    2023-10-23 23:00:07 UTC

  • 6.5. Ruby installation-Windows

    The steps for installing Ruby on a Windows machine are listed below. Note: you may have different versions av...
    2023-10-23 23:00:07 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, ...
    2023-10-24 23:00:07 UTC

  • 6.7. Ruby command line options

    Ruby is typically run from the command line as follows: $ ruby [ options ] [.] [ programfile ] [ argumen...
    2023-10-25 23:00:07 UTC

  • 6.8. Ruby environment variable

    The Ruby interpreter uses the following environment variables to control its behavior. The ENV object contains a list ...
    2023-10-24 23:00:07 UTC

  • 6.9. Ruby syntax

    Let’s write a simple Ruby program. All Ruby file extensions are .rb . so, put the following ...
    2023-10-24 23:00:07 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 incl...
    2023-10-25 23:00:07 UTC

  • 6.11. Ruby classes and objects

    Ruby is a perfect object-oriented programming language. Features of an object-oriented programming language include: ...
    2023-10-26 23:00:08 UTC

  • 6.12. Ruby class case

    The following will create a file named Customer to declare two methods:the Ruby class: ...
    2023-10-26 23:00:07 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...
    2023-10-26 23:00:07 UTC

  • 6.14. Ruby operator

    Ruby supports a rich set of operators. Most operators are actually method calls. For example, a ...
    2023-10-25 23:00:07 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 # char...
    2023-10-25 23:00:07 UTC

  • 6.16. Ruby judgment

    Ruby provides several common conditional structures. Here, we will explain all the conditional statements and the modi...
    2024-01-16 01:55:15 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 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

  • 6.34. Ruby DBI Read operation

    DBI provides several different ways to get records from a database. Hypothetical dbh is a da...
    2023-10-31 23:00:07 UTC

  • 6.35. Ruby connection Mysql-MySql2

    We introduced the use of Ruby DBI in the previous chapter. In this chapter, we use Ruby to connect Mysql to more effic...
    2023-10-31 23:00:07 UTC

  • 6.36. Ruby CGI programming

    Ruby is a general language, not only a language for WEB development, but Ruby development in WEB applications and WEB ...
    2023-11-01 23:00:07 UTC

  • 6.37. Ruby CGI method

    The following is a list of methods for the CGI class: ...
    2023-11-01 23:00:07 UTC

  • 6.38. Ruby CGI Cookie

    The HTTP protocol is stateless. But for a commercial website, it needs to maintain session information between differe...
    2023-11-01 23:00:08 UTC

  • 6.39. Ruby CGI Session

    CGI::Session Persistent session state can be saved for the user and the CGI environment, and th...
    2023-11-01 23:00:07 UTC

  • 6.40. Ruby send email-SMTP

    SMTP (Simple Mail Transfer Protocol), or simple Mail transfer Protocol, is aset of rules for sending messages from sou...
    2023-11-01 23:00:07 UTC

  • 6.42. Ruby XML, XSLT and XPath tutorials

    6.42.1. What is XML? # XML refers to Extensible markup language. ...
    2023-11-02 23:00:06 UTC
Principles and Applications of WebGIS  37

IT Tools  337

Web Frameworks  49

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.

WEB Technology  258

Systems  232

Programming Language  353