size of array

[jungjinki]

I am trying to get the size of an array.
with json
{"main":{"type":"1","paper":"A4"},"s1st":{"column":[1000,5,5],"text2":"text2str"}}
t= json.decode( string, pos, null, arrlen )
I could get "1000" by t.s1st.column[1] and I expected to get 3 by t.s1st.column[0].
but error raisesd.

How can I know the size of "column" array ?
Thank you in advance.

[email protected]

[tst2005]

With the Lua length operator ?

local rawjsondata = [[ {"main":{"type":"1","paper":"A4"},"s1st":{"column":[1000,5,5],"text2":"text2str"}} ]]
local t = require "lunajson".decode(rawjsondata)

print( #t.s1st.column )