Dans Lua 4, de nombreuses tables ont une propriété "n" qui suit le nombre d'éléments à l'intérieur de la table.Lua 4 propriété "n" des tables
Toutes les tables ont-elles cette propriété? Peut-il être outrepassé?
Je demande, parce que j'essaye de développer une routine qui imprime récursivement tous les éléments d'une table dans la syntaxe valide de Lua, et veut savoir s'il est sûr de filtrer tous les "n" éléments du résultat?
Merci.
[modifier]
Voici le script:
-- ThoughtDump v1.4.0
-- Updated: 2017/07/25
-- *****************
-- Created by Thought (http://hw2.tproc.org)
-- Updated by Mikali
-- DESCRIPTION
-- ***********
-- Parses the globals table and __TDPrints its contents to "HW2.log".
-- Can also be used to parse (i.e., pretty-print) generic tables in some cases.
-- Note: functions & variables must actually be declared in order to be parsed.
-- Otherwise, they are ignored.
-- Note: if parsing a table other than the globals table, the __TDPrinted table
-- values may be in a different order than was originally written. Values with
-- numerical indices are moved to the "top" of the table, followed by values
-- with string indices, followed by tables. Functions appear in different
-- locations, depending on whether they are indexed using a number or a string.
-- Note: despite the fact that nil values cannot be stored in tables, they are
-- still handled.
-- Note: even though functions may be referenced within tables, a function will
-- only be parsed correctly if it is indexed using a string that is the same as
-- the name of the function.
__TDOutputString = ""
function __TDParse(name, value, level, verbose, numbers, collapse)
if ((name == "__TDParse") or (name == "__TDSortHash") or (name == "__TDPrint") or (name == "__TDPrintGlobals()") or (name == "__TDOutputString")) then
return
end
local Element = nil
local ValType = type(value)
local NamType = type(name)
local PreLevel = ""
if (collapse == 0) then
for i = 1, level do
PreLevel = PreLevel .. "\t"
end
end
local ComLevel = ""
if (level ~= 0) then
ComLevel = ","
end
if ((ValType == "function") or (ValType == "userdata")) then
if (NamType == "string") then
Element = PreLevel .. name .. " = " .. name .. ComLevel
elseif (numbers == 1) then
Element = PreLevel .. "[" .. name .. "] = " .. name .. ComLevel
else
Element = PreLevel .. name .. ComLevel
end
elseif (ValType == "string") then
if (NamType == "string") then
Element = PreLevel .. name .. " = \"" .. value .. "\"" .. ComLevel
elseif (numbers == 1) then
Element = PreLevel .. "[" .. name .. "] = \"" .. value .. "\"" .. ComLevel
else
Element = PreLevel .. "\"" .. value .. "\"" .. ComLevel
end
elseif (ValType == "number") then
if (NamType == "string") then
Element = PreLevel .. name .. " = " .. value .. ComLevel
elseif (numbers == 1) then
Element = PreLevel .. "[" .. name .. "] = " .. value .. ComLevel
else
Element = PreLevel .. value .. ComLevel
end
elseif (ValType == "table") then
if (NamType == "string") then
Element = PreLevel .. name .. " ="
elseif (numbers == 1) then
Element = PreLevel .. "[" .. name .. "] ="
else
Element = ""
end
elseif (ValType == "nil") then
if (NamType == "string") then
Element = PreLevel .. name .. " = nil" .. ComLevel
elseif (numbers == 1) then
Element = PreLevel .. "[" .. name .. "] = nil" .. ComLevel
else
Element = PreLevel .. "nil" .. ComLevel
end
else
Element = PreLevel .. "-- unknown object type " .. ValType .. " for object " .. name
end
if (verbose == 1) then
Element = Element .. " -- " .. ValType .. ", tag: " .. tag(value)
end
if (((ValType == "table") and (NamType == "number") and (numbers == 0)) or (collapse == 1)) then
__TDPrint(Element, 0)
else
__TDPrint(Element, 1)
end
if (ValType == "table") then
__TDPrint(PreLevel .. "{", collapse == 0)
__TDSortHash(__TDParse, value, level + 1, verbose, numbers, collapse)
__TDPrint(PreLevel .. "}" .. ComLevel, 1)
end
end
function __TDSortHash(func, tabl, level, verbose, numbers, collapse)
local typesarray = {}
local typescount = {}
local keycount = 1
local keyarray = {}
for i, iCount in tabl do
local thistype = type(iCount)
if not (typesarray[thistype]) then
typescount[thistype] = 0
typesarray[thistype] = {}
end
typescount[thistype] = typescount[thistype] + 1
typesarray[thistype][typescount[thistype]] = i
end
sort(typesarray)
for i, iCount in typesarray do
sort(iCount)
for j, jCount in iCount do
keyarray[keycount] = tostring(jCount)
keycount = keycount + 1
end
end
for i, iCount in keyarray do
local tempcount = tonumber(iCount)
if (tempcount) then
iCount = tempcount
end
func(iCount, tabl[iCount], level, verbose, numbers, collapse)
end
end
function __TDPrint(instring, newline)
__TDOutputString = __TDOutputString .. instring
if (newline == 1) then
__TDOutputString = __TDOutputString .. "\n"
end
end
function __TDPrintGlobals()
__TDOutputString = ""
__TDPrint("globals =", 1)
__TDPrint("{", 1)
__TDSortHash(__TDParse, globals(), 1, 0, 0, 0)
__TDPrint("}\n", 1)
local WriteFile = "$test_globals_write.lua"
writeto(WriteFile)
write(__TDOutputString)
writeto()
end
__TDPrintGlobals()
J'utilise 'for' boucles comme vous le suggérez.C'est un vieux jeu qui utilise Lua 4 et je ne peux pas le changer. Après quelques tests, il semble que le paramètre 'n' ne soit ajouté que lorsque j'utilise la fonction' tinsert' pour insérer des valeurs dans la table, et pas autrement. Une solution pourrait donc être de ne jamais utiliser 'tinsert'. – posfan12