Lua String concatenation

Question

I am working on Lua and I have this kind of code

MapMessage(Process["ks.MSH"][1], MsgIn, mg)
MapEvent(Process["ks.EVN"][1], MsgIn, mg)
MapPatient(Process["ks.PID"][1], MsgIn, mg)
MapVisit(Process["ks.PV1"][1],MsgIn,mg)

In above statements, MapMessage, MapEvent, MapPatient, MapVisit are the functions and ks.MSH, ks.EVN, ks.PID, ks.PV1 are the tables in the database. Now, I want to automate a part of this process using gmatch function provided in lua and I have this so far

for u in string.gmatch(S, "([^,%s]+)"), 1 do
     l[k] = u 
    _G["Map"..l[k]](Process["ks[l[k]]"][1], R[1])
     k=k+1
   end

but the concatenation part in the third line of above code is not really making it ks.MSH, ks.PID, ks.PV1 e.t.c, so please suggest what needs to be there in place of (Process["ks[l[k]]"][1]to get s.MSH, ks.PID, ks.PV1 e.t.c

@Egor, No since I have double quotes around as well, it's not working, Please have a closer look , (Process["ks.PV1"][1],MsgIn,mg) , This is what exactly I need — systemdebt
– systemdebt, Commented Mar 12, 2014 at 16:18
@hjpotter92: In S, I have "MSH, PID, PV1, EVN" e.t.c, depending on events, sometimes I have all these 4 , rest of the time any 3 or 2 — systemdebt
– systemdebt, Commented Mar 12, 2014 at 17:07

hjpotter92 · Accepted Answer · 2014-03-12 17:19:34Z

3

Since your string contains "MSH, PID, PV1, EVN", you'd have to use a hash-table or a lookup table. The program would be something like this:

S = "MSH, PID, PV1, EVN"
tLookup = {
    MSH = "Message",
    EVN = "Event",
    PID = "Patient",
    PV1 = "Visit",
}

for u in S:gmatch "([^,%s]+)" do
    sNameOfFunction = tLoopup[u]
    _G[ "Map"..sNameOfFunction ] ( Process["ks."..u][1], MsgIn, mg )
     k=k+1
end

Or even something like this:

S = "MSH, PID, PV1, EVN"
tLookup = {
    MSH = _G.MapMessage,
    EVN = _G.MapEvent,
    PID = _G.MapPatient,
    PV1 = _G.MapVisit,
}

for u in S:gmatch "([^,%s]+)" do
    tLoopup[u] ( Process["ks."..u][1], MsgIn, mg )
    k = k+1
end

answered Mar 12, 2014 at 17:19

hjpotter92

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2 Comments

systemdebt Over a year ago

Thanks hjpotter92: by the way, this code worked from me, I figured oit as soon as you suggested about S .Here is the code that worked:ks = {MSH = "ks.MSH", EVN = "ks.EVN", PID = "ks.PID", PV1 = "ks.PV1", PV2 = "ks.PV2"} S = tostring(R[1].AllSegmentsList) l = {} k = 1 for u in string.gmatch(S, "([^,%s]+)") do l[k] = u _G["Map"..l[k]](Process[ks[l[k]]][1], MsgIn, mg) k=k+1

hjpotter92 Over a year ago

@Simrankaur You can mark the solution as selected/answer and the question will appear as such in the questions list.

systemdebt · Accepted Answer · 2014-03-12 17:23:54Z

1

Here is what finally worked, thanks Egor and hjpotter92 :)

ks = {MSH = "ks.MSH", EVN = "ks.EVN", PID = "ks.PID", PV1 = "ks.PV1", PV2 = "ks.PV2"}
S = tostring(R[1].AllSegmentsList)
 l = {}
k = 1
for u in string.gmatch(S, "([^,%s]+)") do
 l[k] = u 
 _G["Map"..l[k]](Process[ks[l[k]]][1], MsgIn, mg)
   k=k+1
end

answered Mar 12, 2014 at 17:23

systemdebt

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1 Comment

user2033018 Over a year ago

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