'how to write a Lua pattern to convert string (nested array) into a real array?

I would like to convert a string into an array (a small map in a game with coordinates, colors, etc.), the string represents a nested array, and I am not sure how to do it. I would like to open an array after the first { , then open an array after each { , and read the key/value until the } :

function stringToArray()
    local Array = {}
    local txt = "{ {Group = 123, Pos = 200}, {Group = 124, Pos = 205} }"
    for str in string.gmatch(txt, .....
end
stringlualua-patterns


Solution 1:[1]

Without such functions that are possibly sandboxed like load() for example
you have to parse the string and construct (key/value pairs) what you want.
A good idea for further decisions/conditions and analyzing could be
to count what is not needed to construct...

local txt = "{ {Group = 123, Pos = 200}, {Group = 124, Pos = 205} }"
local _, lcurlies = txt:gsub('%{','')
local _, rcurlies = txt:gsub('%}','')
local _, commas = txt:gsub(',','')
local _, spaces = txt:gsub('%s','')
local _, equals = txt:gsub('=','')

print(lcurlies,rcurlies,commas,spaces,equals)
-- Puts out: 3  3   3   13  4

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 koyaanisqatsi

Related Questions