Hi Mathieu, On 2012-01-27 19:06, Mathieu Dupont wrote:

Hi List, Running the following code, variable "a" should not be modified by my function, and stay (1,2), but it does get modified and becomes (4,2) like the new variable "b" I am creating.

Tables are references. Using the “local” keyword, you generate a local variable that still points to the original table. Instead, you need to (deep) copy the table explicitly. ································································· \starttext \startluacode function myFunc(arg) local var = table.copy(arg) var[1] = var[1] + 3 return var end local a = {1,2} local b = myFunc(a) context.type(table.serialize(a)) context[[\par\blank]] context.type(table.serialize(b)) context[[\par\blank]] \stopluacode \stoptext \endinput ································································· There’s also a function table.fastcopy(), see http://wiki.contextgarden.net/table_manipulation#table.fastcopy.28table_t.2C... Hth, Philipp

What is wrong with my code ? Thank you for any hint ! Mathieu

\starttext

\startluacode

function myFunc(arg) local var = arg var[1] = var[1] + 3 return var end

local a = {1,2}

context("a = \\{") context(a[1]) context(",\\;") context(a[2]) context("\\}\\par") context("\\blank")

local b = myFunc(a)

context("a = \\{") context(a[1]) context(",\\;") context(a[2]) context("\\}\\par") context("\\blank")

context("b = \\{") context(b[1]) context(",\\;") context(b[2]) context("\\}\\par")

\stopluacode

\stoptext

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