Re: Creating a nodeMCU Lua unofficial FAQ
Posted: Mon Jun 01, 2015 3:41 pmI've just uploaded another tranche of edits and content.
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Discussions on my nodeMCU Lua unofficial FAQ
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Posted: Mon Jun 01, 2015 3:41 pmRe: Discussions on my nodeMCU Lua unofficial FAQ
Posted: Mon Jun 08, 2015 5:56 amAlthough I'm not the creator of nodemcu and have no access to official website, I want do something and contribute this wiki. My English is poor but I will do my best, please help me if I make some error.
Re: Discussions on my nodeMCU Lua unofficial FAQ
Posted: Thu Jun 25, 2015 2:19 pmHi Terry,
A really, really great write up!! Thank you so much for this. Ive finished my second read of it.
I have a question on volatile modules and specifically the volatile function. You posted up some code:
and I mostly understand all of this except for the very first line "local module ... --comment"
When i compile this in the esp i get a lua error: stdin:1: spl.lua:1: unexpected symbol near '...'
I cannot seem to determine why this would be. Any help please??
Here is the full volatile module/function:
A really, really great write up!! Thank you so much for this. Ive finished my second read of it.
I have a question on volatile modules and specifically the volatile function. You posted up some code:
Code: Select all
local module ... -- this is a situation where using an upvalue is essential!
return function (csocket)
package.loaded[module]=nil
module = nil
-- . . .
endand I mostly understand all of this except for the very first line "local module ... --comment"
When i compile this in the esp i get a lua error: stdin:1: spl.lua:1: unexpected symbol near '...'
I cannot seem to determine why this would be. Any help please??
Here is the full volatile module/function:
Code: Select all
local spl ...
return function split(inputstr, sep)
if sep == nil then
sep = "%s"
end
local t={}
local i=1
for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
t[i] = str
i = i + 1
end
package.loaded['spl']=nil
spl=nil
return t
endRe: Discussions on my nodeMCU Lua unofficial FAQ
Posted: Fri Jun 26, 2015 12:52 pmDurr,, my bad. There's an = missing. Require passes a single argument: it's name, so the tuple ... which the varargs reference is a list with a single variable in it -- the name, so if your file is "spl.lua" then if the first assignment is
will set the local variable module to "spl". The require() will set package.loaded.spl to reference the returned function, preventing its garbage collection, hence
will remove this reference so once all other references go out of scope, the memory used by the module can be garbage collected.
I hope this explanation helps.
Code: Select all
local module = ...will set the local variable module to "spl". The require() will set package.loaded.spl to reference the returned function, preventing its garbage collection, hence
Code: Select all
package.loaded[module]=nilwill remove this reference so once all other references go out of scope, the memory used by the module can be garbage collected.
I hope this explanation helps.