File: ex6.lua

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file content (14 lines) | stat: -rw-r--r-- 231 bytes parent folder | download | duplicates (7) 
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function source.chain(src, f)
  return function()
    if not src then
      return nil
    end
    local chunk, err = src()
    if not chunk then
      src = nil
      return f(nil)
    else
      return f(chunk)
    end
  end
end