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Tables - some basics
Tables and the table library. example from a Well House Consultants training course
More on Tables and the table library. [link]

This example is described in the following article(s):
   • Lua Tables - [link]

Source code: tabo Module: U105
--[[
Lua uses its tables as its single collection type.
This example shows some of the basics
]]


print ("Tables start at position number ONE by default")
-- The # operator give the length of a table
occupants = {"Jones","Smith","Patel","Brown","Ng"}
for k=1,#occupants do
        print ("Room " .. k .. " the " .. occupants[k] .. " family")
end

print ("\nTables can contain mixed variables")
print ("Tables can be expanded later")
occupants = {"Jones",14,nil,12.5,"Ng"}
occupants[6] = "Hedgehog"
for k=1,#occupants do
        -- Note lazy "or" operator
        print ("Now " .. k .. " the " .. (occupants[k] or 66) .. " family")
end

print ("\nTables of tables")
ages = {{25,27},{40},{35,42},{44,50},{19,35}}
for k=1,#ages do
for j=1,#ages[k] do
        print (k .. "/" .. j .. " - " .. ages[k][j])
end
end

--[[ ------------ sample output ----------------
[trainee@easterton u105]$ lua tabo
Tables start at position number ONE by default
Room 1 the Jones family
Room 2 the Smith family
Room 3 the Patel family
Room 4 the Brown family
Room 5 the Ng family

Tables can contain mixed variables
Tables can be expanded later
Now 1 the Jones family
Now 2 the 14 family
Now 3 the 66 family
Now 4 the 12.5 family
Now 5 the Ng family
Now 6 the Hedgehog family

Tables of tables
1/1 - 25
1/2 - 27
2/1 - 40
3/1 - 35
3/2 - 42
4/1 - 44
4/2 - 50
5/1 - 19
5/2 - 35
[trainee@easterton u105]$

]]


Learn about this subject
This module and example are covered on the following public courses:
 * Learning to program in Lua
 * Lua Programming
 * Lua Programming
Also available on on site courses for larger groups

Books covering this topic
Yes. We have over 700 books in our library. Books covering Lua are listed here and when you've selected a relevant book we'll link you on to Amazon to order.

Other Examples
This example comes from our "Tables and the table library." training module. You'll find a description of the topic and some other closely related examples on the "Tables and the table library." module index page.

Full description of the source code
You can learn more about this example on the training courses listed on this page, on which you'll be given a full set of training notes.

Many other training modules are available for download (for limited use) from our download centre under an Open Training Notes License.

Other resources
• Our Solutions centre provides a number of longer technical articles.
• Our Opentalk forum archive provides a question and answer centre.
The Horse's mouth provides a daily tip or thought.
• Further resources are available via the resources centre.
• All of these resources can be searched through through our search engine
• And there's a global index here.

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This is a sample program, class demonstration or answer from a training course. It's main purpose is to provide an after-course service to customers who have attended our public private or on site courses, but the examples are made generally available under conditions described below.

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This web site is written and maintained by Well House Consultants.

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