This page describes a sample Lua function that will take an input string, split it into 10 strings based on a comma (",") character, and then return the array of 10 strings to the trigger action.
Note that the input parameters from the trigger action are passed using the DWInput object, and the output parameters are returned through the DWOutput object.
Sample script
The sample Lua script file can be downloaded and used:
stringsplit.lua
function split(str, delim, maxNb)
-- Eliminate bad cases
if string.find(str, delim) == nil then
return { str }
end
if maxNb == nil or maxNb < 1 then
maxNb = 0 -- No limit
end
local result = {}
local pat = "(.-)" .. delim .. "()"
local nb = 0
local lastPos
for part, pos in string.gfind(str, pat) do
nb = nb + 1
result[nb] = part
lastPos = pos
if nb == maxNb then break end
end
-- Handle the last field
if nb ~= maxNb then
result[nb + 1] = string.sub(str, lastPos)
end
return result
end
function stringsplit()
DWOutput["OUT"] = split(DWInput["IN"],",",10)
return 0
end