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Using string.find and string.sub to split
Strings and the String library. example from a Well House Consultants training course
More on Strings and the String library. [link]

This example is described in the following article(s):
   • Lua examples - coroutines, error handling, objects, etc - [link]

Source code: splitter Module: U104

Lua doesn't have a built in split routine. Here's one (low
level) way of doing the job using string.find and string.sub;
another neater way (which you'll find in our other examples)
would be to use string.gfind in a for loop


addy = "48, Spa Road, Melksham, SN12 7NY"

here = 1
rows = {}

-- Next line is a demo of how you could "preset" an item
-- in the resulting table; the application will skip over
-- this item, leaving it untouched, as it fills the table
rows[2] = "or house next door"

while here > 0 do
        itsat = string.find(addy,", ",here)
        if itsat ~= nil then
                rows[#rows+1] = string.sub(addy,here,itsat-1)
                here = itsat + 2
                rows[#rows+1] = string.sub(addy,here)
                here = 0

print (rows)
for k,v in pairs(rows) do
        print (k,v)

--[[ Sample output ............

[trainee@easterton nts]$ lua splitter
table: 0x9c0e738
1 48
2 or house next door
3 Spa Road
4 Melksham
5 SN12 7NY
[trainee@easterton nts]$


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

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

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