Adrian Hey wrote: > There are plenty situations where it makes no semantic sense to allow > 2 or more or some "thing". A list of all active processes for example.
"all" referring to what scope? perhaps there occurs a situation with several process (thread) pools, severals cores etc. See also "singleton considered harmful", there are similar arguments: http://www.oreillynet.com/cs/user/view/cs_msg/23417 and also Section 13.3 "Global Data" in McConnell: Code Complete (2nd ed.) has a nice discussion. J.W.
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