Re: File Extensions Problem
Re: File Extensions Problem
- Subject: Re: File Extensions Problem
- From: Ken Thomases <email@hidden>
- Date: Thu, 28 Aug 2008 13:28:02 -0500
On Aug 27, 2008, at 5:59 PM, R.L. Grigg wrote:
Hmm, I guess the wrinkle in this particular case is if the
"contract" doesnt specify something that the programmer assumes to
be safe to do (like enumerating backwards), how can you know how to
implement your end?
Enumerating NSArrays backwards is safe and supported by the
framework. The earlier discussion had to do with mutating a
collection while enumerating, which is explicitly stated to be
unsafe. Somebody (I forget who) claimed that mutating was "safe"
while enumerating backwards, but they were wrong. In this case,
their wrongness was not based on things left unsaid in the contract,
but on violating things explicitly laid out in the contract.
Cheers,
Ken
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