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What is in a table?
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):
   • The indexed and hashed parts of a Lua table - [link]

Source code: duh Module: U105
A Lua table contains both a sequentially indexed
section and a hash keyed section (and a few other
things too). When you sort the table, you sort
only the index keyed section, when you use ipairs
you use just the first (indexed) section, but when
you use pairs you use the whole table.

givita_go = {4,7,5,12,5,4,3,also = 44, agen = 29,
        andsoon = 77, andsoforth=18}
givita_go[9] = 400
givita_go[8] = 540
givita_go[1225708225] = 1540
-- It has actually patched 8 and 9 in

--[[ You do NOT get out of memory as you would in Perl
when you use a phone number as key to a "list" ]]

-- Sorting is in situ
table.sort (givita_go)

-- just the sequential elements at the start
for k,v in ipairs(givita_go) do
        print (k,v)
-- all the elements
for k,v in pairs(givita_go) do
        print (k,v)

print (#givita_go)

a = {}
a["gerald"] = "Jones"
a["name"] = "Smith"
name = "gerald"

-- First two are the literal element called "name"
print (a.name)
print (a["name"])

-- Third is the element who's name is in the
-- name variable
print (a[name])
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
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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
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