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/c length = 6
for _, train in pairs(game.player.force.get_trains()) do
  if #train.carriages ~= length then
    game.player.print("[gps=".. train.carriages[1].position.x ..",".. train.carriages[1].position.y .."]")
  end
end

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for i, resource in pairs(data.raw.resource) do
  resource.minable.result = "uranium-ore"
end

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my_functions = require("scripts.some_functions")
require("scripts.file1")

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assert(my_functions, "my_functions does not exist!") -- will not fail

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local tmp = 1
log(debug.getinfo(tmp).source)