Basic lua: Iteration and Loops - Revision history

AFRLme at 15:14, 10 September 2022

2022-09-10T15:14:29Z

AFRLme at 14:46, 10 September 2022

2022-09-10T14:46:41Z

AFRLme: Created page with "{| class="in" |- | class="i_arrow clickablecell" | < | class="i_norm clickablecell" | '''Index''' | class="i_arrow clickablecell" |..."

2022-09-10T14:45:09Z

Created page with "{| class="in" |- | class="i_arrow clickablecell" | < | class="i_norm clickablecell" | '''Index''' | class="i_arrow clickablecell" |..."

New page

{| class="in"
|-
| class="i_arrow clickablecell" | [[basic_lua:_Tables|<]]
| class="i_norm clickablecell" | '''[[basic_lua:_Index|Index]]'''
| class="i_arrow clickablecell" | [[basic_lua:_Functions|>]]
|}
<hr>
Functions can be really useful as they let us process/calculate huge amounts of data & return it, also if you include input arguments then they can potentially be reused multiple times over, which can reduce overall workload & increase workflow.

== Creating Functions ==
Below I am going to show you how to create your own custom functions.

=== Classic Function ===
{| class="ts"
|-
! print hello world! !!
|-
| style="max-width:680px;" | <syntaxhighlight lang="lua">
function hello()
print("hello world!")
end

hello()
</syntaxhighlight> || width="180px" style="vertical-align:middle;" | [[File:Basic_lua_(functions)_1.png|frameless|center|180px]]
|}

=== Variable as Function ===
{| class="ts"
|-
! print hello world! !!
|-
| style="max-width:680px;" | <syntaxhighlight lang="lua">
hello = function()
print("hello world!")
end

hello()
</syntaxhighlight> || width="180px" style="vertical-align:middle;" | [[File:Basic_lua_(functions)_2.png|frameless|center|180px]]
|}

=== Function with Input Arguments ===
{| class="ts"
|-
! print 6 !!
|-
| style="max-width:680px;" | <syntaxhighlight lang="lua">
function plus(a, b)
return a + b
end

print( plus(2, 4) )
</syntaxhighlight> || width="180px" style="vertical-align:middle;" | [[File:Basic_lua_(functions)_3.png|frameless|center|180px]]
|}

=== Input Arguments and Fallback ===
{| class="ts"
|-
! print 0.5, 5 !!
|-
| style="max-width:680px;" | <syntaxhighlight lang="lua">
function divideAndConquer(a, b, c)
c = c or 1 -- if c equals nil then c equals 1
return (a / b) * c
end

print( divideAndConquer(2, 4) ) -- 2 ÷ 4 x 1 = 0.5
print( divideAndConquer(2, 4, 10) ) -- 2 ÷ 4 x 10 = 5
</syntaxhighlight> || width="180px" style="vertical-align:middle;" | [[File:Basic_lua_(functions)_4.png|frameless|center|180px]]
|}
<hr>
{| class="in"
|-
| class="i_arrow clickablecell" | [[basic_lua:_Tables|<]]
| class="i_norm clickablecell" | '''[[basic_lua:_Index|Index]]'''
| class="i_arrow clickablecell" | [[basic_lua:_Functions|>]]
|}{{toc}}

@@ Line 6: / Line 6: @@
 |}
 <hr>
-Functions can be really useful as they let us process/calculate huge amounts of data & return it, also if you include input arguments then they can potentially be reused multiple times over, which can reduce overall workload & increase workflow.
+Being able to iterate through data for the purpose of reading it or manipulating it is very important when it comes to scripting as it is a real time saver. There are multiple different ways to create iteration loops & loops in general with Lua script.
-== Creating Functions ==
+== Iteration ==
-Below I am going to show you how to create your own custom functions.
+Below I am going to show you how to use the 3 main types of '''for''' iteration loops.
-=== Classic Function ===
+=== for i equals 1 ===
 {| class="ts"
 |-
-! print hello world! !!
+! iterate through an index table !!
 |-
 | style="max-width:680px;" | <syntaxhighlight lang="lua">
-function hello()
+local t = {"Hi,", "my", "name", "is", "Barry."}
- print("hello world!")
+local str = ""
 end
-hello()
+print(str) -- print the content of the str variable to the log  print(str)
-</syntaxhighlight> || width="180px" style="vertical-align:middle;" | [[File:Basic_lua_(functions)_1.png|frameless|center|180px]]
+</syntaxhighlight> || width="180px" style="vertical-align:middle;" | [[File:Basic_lua_(loops)_1.png|frameless|center|180px]]
 |}

@@ Line 1: / Line 1: @@
 {| class="in"
 |-
-| class="i_arrow clickablecell" |  [[basic_lua:_Tables|<]]
+| class="i_arrow clickablecell" |  [[basic_lua:_Functions|<]]
 | class="i_norm clickablecell" | '''[[basic_lua:_Index|Index]]'''
-| class="i_arrow clickablecell" | [[basic_lua:_Functions|>]]
+| class="i_arrow clickablecell" | [[basic_lua:_Strings_and_Patterns|>]]
 |}
 <hr>
@@ Line 71: / Line 71: @@
 {| class="in"
 |-
-| class="i_arrow clickablecell" |  [[basic_lua:_Tables|<]]
+| class="i_arrow clickablecell" |  [[basic_lua:_Functions|<]]
 | class="i_norm clickablecell" | '''[[basic_lua:_Index|Index]]'''
-| class="i_arrow clickablecell" | [[basic_lua:_Functions|>]]
+| class="i_arrow clickablecell" | [[basic_lua:_Strings_and_Patterns|>]]
 |}{{toc}}