Sort a list of object identifiers: Difference between revisions

===Using Coroutine===

<lang lua>

local function oidGen(s)

local wrap, yield = coroutine.wrap, coroutine.yield

return wrap(function()

for n in s:gmatch"%d+"do yield(tonumber(n))end

end)

end

local function oidCmp(a,b)

local agen,bgen = oidGen(a),oidGen(b)

local n,m = agen(),bgen()

while n and m do

if n~=m then return n<m end

n,m = agen(),bgen()

end

return m and true or false -- bgen longer with previous equal

end

local OIDs = {

"1.3.6.1.4.1.11.2.17.19.3.4.0.10",

"1.3.6.1.4.1.11.2.17.5.2.0.79",

"1.3.6.1.4.1.11.2.17.19.3.4.0.4",

"1.3.6.1.4.1.11150.3.4.0.1",

"1.3.6.1.4.1.11.2.17.19.3.4.0.1",

"1.3.6.1.4.1.11150.3.4.0"

}

table.sort(OIDs, oidCmp)

for _, oid in pairs(OIDs) do print(oid) end

</lang>

The wrapped coroutine lazily generate elements for comparison, should be a bit efficient.