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Lua - printTable - print tables on stdout or write into files
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| --[[ | |
| A simple function to print tables or to write tables into files. | |
| Great for debugging but also for data storage. | |
| When writing into files the 'return' keyword will be added automatically, | |
| so the tables can be loaded with 'dofile()' into a variable. | |
| The basic datatypes table, string, number, boolean and nil are supported. | |
| The tables can be nested and have number and string indices. | |
| This function has no protection when writing files without proper permissions and | |
| when datatypes other then the supported ones are used. | |
| --]] | |
| -- t = table | |
| -- f = filename [optional] | |
| function printTable(t, f) | |
| local function printTableHelper(obj, cnt) | |
| local cnt = cnt or 0 | |
| if type(obj) == "table" then | |
| io.write("\n", string.rep("\t", cnt), "{\n") | |
| cnt = cnt + 1 | |
| for k,v in pairs(obj) do | |
| if type(k) == "string" then | |
| io.write(string.rep("\t",cnt), '["'..k..'"]', ' = ') | |
| end | |
| if type(k) == "number" then | |
| io.write(string.rep("\t",cnt), "["..k.."]", " = ") | |
| end | |
| printTableHelper(v, cnt) | |
| io.write(",\n") | |
| end | |
| cnt = cnt-1 | |
| io.write(string.rep("\t", cnt), "}\n") | |
| elseif type(obj) == "string" then | |
| io.write(string.format("%q", obj)) | |
| else | |
| io.write(tostring(obj)) | |
| end | |
| end | |
| if f == nil then | |
| printTableHelper(t) | |
| else | |
| io.output(f) | |
| io.write("return") | |
| printTableHelper(t) | |
| io.output(io.stdout) | |
| end | |
| end |
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