4. Lua

  • 4.1. Lua tutorial

    Lua is a lightweight and compact scripting language written in the standard C language and open in ...
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  • 4.2. Lua environment installation

    4.2.1. Install on Linux system # It is very easy to install Lua on Linu...
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  • 4.3. Lua basic syntax

    Lua is very easy to learn, and we can create the first Lua program! 4.3.1. The first Lua ...
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  • 4.4. Lua data type

    Lua is a dynamically typed language, variables do not need type definition, only need to assign values to variables. T...
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  • 4.5. Lua variable

    Before a variable can be used, it needs to be declared in the code, that is,to create the variable. Before th...
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  • 4.6. Lua cycle

    In many cases, we need to do some regular repetitive operations, so we need to repeat some statements in the program. ...
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  • 4.7. Lua while cycle

    In Lua programming language, the while loop statement repeatedly e...
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  • 4.8. Lua for cycle

    In Lua programming language the for loop statement can repeat the ...
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  • 4.9. Lua repeat…until cycle

    In Lua programming language repeat...until , a loop statement is d...
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  • 4.10. Lua loop nesting

    Lua loop is allowed to be embedded in a loop in a programming language. The following example d...
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  • 4.11. Lua break statement

    Lua programing language break statement is inserted into the body of ...
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  • 4.12. Lua goto statement

    In Lua language goto statement allows the control flow to be trans...
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  • 4.13. Lua process control

    Lua programming language flow control statements are set by the program to set one or more cond...
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  • 4.14. Lua if statement

    Lua if statement consists of a Boolean expression as a conditional judgment, followed by oth...
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  • 4.15. Lua if…else statement

    4.15.1. If…else statement # Lua if stat...
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  • 4.16. Lua if nested statement

    4.16.1. If…else statement # Lua if stat...
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  • 4.17. Lua function

    In Lua, functions are the main way to abstract statements and expressions. It can not only be used to handle some spec...
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  • 4.18. Lua operator

    An operator is a special symbol that tells the interpreter to perform specific mathematical or logical operations. Lua...
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  • 4.19. Lua string

    A string or string is a string of characters consisting of numbers,letters, and underscores. Strings in the L...
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  • 4.20. Lua array

    An array is a collection of elements of the same data type arranged in a certain order, which can be an one-dimensiona...
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  • 4.21. Lua iterator

    An iterator is an object that can be used to traverse some or all of the elements in a standard template library conta...
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  • 4.22. Lua table

    table is a data structure of Lua to help us create different data types,such as arrays, diction...
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  • 4.23. Lua modules and packages

    Module is similar to a wrapper library. Starting from Lua 5.1, Lua adds a standard module ma...
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  • 4.24. Lua meta-table

    In Lua table, we can access the corresponding key to get value val...
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  • 4.25. Lua collaborative program (coroutine)

    4.25.1. What is coroutine? # Lua collaborative programs (coroutine) are...
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  • 4.26. Lua file I/O

    The Lua I/O library is used to read and process files. It is divided into simple mode (like C) and full mode. ...
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  • 4.27. Lua error handling

    Error handling is necessary when the program is running, and unexpected errors will occur in the process of file opera...
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  • 4.28. Lua debugging

    Lua provide debug the library is used to provide the ability to creat...
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  • 4.29. Lua garbage collection

    Lua automatic memory management is adopted. This means that you don’t have to worry about how t...
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  • 4.30. Lua object oriented

    Object-oriented programming is a very popular computer programming architecture. The following programming la...
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  • 4.31. Lua database access

    This article mainly introduces the Lua database operation library: LuaSQL . He is open-source and suppo...
    2023-10-12 23:00:02 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