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[Metallion]

I've a script in the hack/scripts (add-syndromes) directory that require a file (syndrome-util) in the hack/lua directory, which in turn requies another file (utils) in the hack/lua directory.  When I try to run add-syndromes, I get the error:

...workDF V6.2\Dwarf Fortress\hack\scripts/add-syndrome.lua:6: attempt to call field 'invert' (a nil value)
stack traceback:
        ...workDF V6.2\Dwarf Fortress\hack\scripts/add-syndrome.lua:6: in main chunk
        (...tail calls...)

I've confirmed that invert is a function defined in utils.lua.

What am I doing wrong?

[Putnam]

Lua, not LUA.

It's trying to call "invert" rather than "utils.invert".

[Metallion]

I'm afraid that's not it.  I should have quoted the code:

--usage: syndromeUtil.ResetPolicy.DoNothing, syndromeUtil.ResetPolicy.ResetDuration, etc
ResetPolicy = ResetPolicy or utils.invert({
"DoNothing",
"ResetDuration",
"AddDuration",
"NewInstance"
})

(Please note I take no credit for this code!)

[Putnam]

Did you just copy the code from 0.40.24 to 0.34.11? I'm not sure if that'll work. utils.invert wasn't added until later.

[Metallion]

That may be it.  I'll see if the latest version of DFHack works with MDF.  Thanks.

[lethosor]

utils.invert was added in DFHack 0.40.08-r1: https://github.com/DFHack/dfhack/commit/0db0244d08e69eb36c0f31700c76b2de83fbc4ef
You could easily implement that function in your script, though:

Code: [Select]

function invert(tab)
    local result = {}
    for k,v in pairs(tab) do
        result[v]=k
    end
    return result
end