HC3 Store a table into Global Variable

[Nevicare 0]

Hi All,

 

I want to store a table into a variable, this looks fine:
 

function QuickApp:onInit()

self:debug("onInit")

Table={}

 

local TimeHour = os.date('%H')

-- Array Session

Table[TimeHour]="1000"

Table[TimeHour+1]="1501"

Table[TimeHour+2]="2500"

 

hub.setGlobalVariable("TableVAR", json.encode(Table))

end

 

The TableVAR has the following content:

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But now I want the read this TableVAR again back into the Table array.

That is the part I don't get to work..

 

Table=json.encode(hub.getGlobalVariable("TableVAR"))

Gives the error:
/usr/share/lua/5.3/json/util.lua:55: bad argument #1 to 'for iterator' (table expected, got number)

 

And when I try to read the Global Variable like this:

Table=json.encode(tostring(hub.getGlobalVariable("TableVAR")))

 

The output is:

print ("Table" .. Table)

Table"{\"12\":\"1501\",\"13\":\"2500\",\"11\":\"1000\"}"
 

But the I can't use this as a table..

print ("Table field 12 " .. Table["12"])

Gives an error:
main.lua:20: attempt to concatenate a nil value (field '12')
 

Which part am I missing here? What is the correct way to handle a table in a Global Variable?

 

Thanks in advance.

[Stycx 9]

@Nevicare

If you read out a globalvar you get 2 return arguments: the value and a timestamp

So you need to define a variable to just save the globalvar itself

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Then you can save the new variable as json table like this and there you can then use it as table

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Edited April 2, 2025 by Stycx

[jgab 2,642]

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The extra (...) discards the second result from getGlobalVariable that interferes with json.decode

 

[Nevicare 0]

Thanks Stycx,

That works

 

Now I want to have a for-loop to walk through this table.

But the for loop below doesn't give any output at all..

 

print(hub.getGlobalVariable("TableVAR"))

tableVar,_ = hub.getGlobalVariable("TableVAR")

print(tableVar)

 

Table2 = json.decode(tableVar)

 

for k,r in ipairs(Table2)

do

  print("Table " .. Table2[k] .. " output r " ..  r )

end

[jgab 2,642]

Use 'ipair' for an array
Use 'pair' for a key/value table

[Nevicare 0]

Thanks all, that did the trick.