[EMAIL PROTECTED] (Alex Martelli) writes:
> Neil Hodgson <[EMAIL PROTECTED]> wrote:
>> Ruby uses '!' not for mutation but to indicate surprising or
>> destructive mutation. If it was placed on all mutators, code would be
>> full of '!'s. '!' is less common on methods that modify the receiver
>> than on methods that mutate other arguments.
> Thanks for the clarification! Unfortunately, this variation on the
> convention does make it substantially less clear/sharp/well-defined, and
> therefore less useful;
For the record, the ! convention (and the ? convention) are used by
scheme, where it is used to indiciation mutation (and a predicate). Of
course, scheme isn't OO, and is functional, so that mutation is the
exception rather than the rule.
<mke
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