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I am close to submit - question about the flag mode

 
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Hi,

- It was mentioned in UrlyBird assignement :
�The mode flag must be either "server", indicating the server program must run, "alone", indicating standalone mode, or left out entirely, in which case the network client and gui must run.�

which mode must run if it is not specified in the arguments list?
 
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Either you define a default (probably client mode) or you don't start and display an adequate message. I personally go with the latter option.
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