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Difference between revisions of "LUA"
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Lua is a portable [[interpreted languages|interpreted language]]. It is mainly used in Games, however it is also used by [[nmap|NMAP]]'s Scripting Engine | Lua is a portable [[interpreted languages|interpreted language]]. It is mainly used in Games, however it is also used by [[nmap|NMAP]]'s Scripting Engine | ||
| + | <font size="-2">Special thanks to [[User:Trep|Trep]] for his contributions to this article.</font> | ||
=Comments= | =Comments= | ||
{{code|text= | {{code|text= | ||
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=Variables= | =Variables= | ||
| − | + | Variables in Lua are very simple. it is not required to declare the variable's data type, just assign a value. | |
{{code|text= | {{code|text= | ||
<source lang="lua"> | <source lang="lua"> | ||
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}} | }} | ||
==Global Variables vs Local Variables== | ==Global Variables vs Local Variables== | ||
| − | When | + | |
| + | When Variables in lua are declared, they are globally accessible unless otherwise specified with ''local''. | ||
{{code|text= | {{code|text= | ||
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| − | Declaring | + | ====Declaring an empty Table==== |
{{code|text= | {{code|text= | ||
<source lang="lua"> | <source lang="lua"> | ||
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</source> | </source> | ||
}} | }} | ||
| − | + | ====Declaring, and populating a Table==== | |
| − | + | ||
{{code|text= | {{code|text= | ||
<source lang="lua"> | <source lang="lua"> | ||
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</source> | </source> | ||
}} | }} | ||
| − | + | The above declaration is exact to the one below | |
{{code|text= | {{code|text= | ||
<source lang="lua"> | <source lang="lua"> | ||
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}} | }} | ||
| + | ====Indexing Tables==== | ||
{{Protip|Unlike what you would expect, the index for a table starts at 1, instead of 0.}} | {{Protip|Unlike what you would expect, the index for a table starts at 1, instead of 0.}} | ||
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| + | {{programming}}{{social}} | ||
| − | [[Category:Programming Languages]] | + | [[Category:Interpreted languages]][[Category:Programming Languages]] |
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Latest revision as of 04:43, 20 September 2012
Lua is a portable interpreted language. It is mainly used in Games, however it is also used by NMAP's Scripting Engine
Special thanks to Trep for his contributions to this article.
Contents
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Variables
Variables in Lua are very simple. it is not required to declare the variable's data type, just assign a value.
Var = 1 Var2 = "Im a var!" Var3 = 2 Var4 = Var * Var3 |
Global Variables vs Local Variables
When Variables in lua are declared, they are globally accessible unless otherwise specified with local.
GlobalVar = 0 local LocalVar = 1337 |
Functions
Functions in lua are quite easy as well.
function SimpleAddition(x,y,z) local Sum = x + y + z --only accessible from within this context. SumTimesTwo = Sum * 2 -- can be referenced from anywhere in the current file, or wherever file is loaded. return Sum end |
Tables
Lua tables are a bit like arrays, except that an array is.. well an array of values. A Table, is an array of Keys, and those Keys have values.
Declaring an empty Table
MyTable = {} --declares an empty table. |
Declaring, and populating a Table
Numbers = {"one","Two","Three","Four","Five"} |
The above declaration is exact to the one below
Numbers = {} Numbers[1] = "one" Numbers[1] = "Two" Numbers[1] = "Three" Numbers[1] = "Four" Numbers[1] = "Five" |
Indexing Tables
Protip: Unlike what you would expect, the index for a table starts at 1, instead of 0.
Numbers = {"one","Two","Three","Four","Five"} print(Numbers[0]) -- prints nil, as index starts at 1. print(Numbers[1]) -- prints "one" |
