On Jan 10, 2009, at 6:45 AM, Alastair Houghton wrote:
On 10 Jan 2009, at 00:11, Adam Foltzer wrote:
I've noticed a pattern in some Apple code where the instance
variables are
all prefixed with an underscore, but the property name, and
therefore the
accessors, are what you'd expect.
Except that there's a long-standing rule that we shouldn't use
leading underscores for either member variable names or private
method names because names beginning with underscore are reserved
for Apple's own use (even member variable names, IIRC). So if
you're going to use a prefix, it's probably best to pick something
like "m" (for "member").
But in general I think it's better not to prefix the names of member
variables, and then in your initialisers, to use a different name
for the argument.
My personal pattern is to leave the ivars as-is. Then, for
parameters, I prefix with 'a' or 'an'. Local variables are prefixed
with 'the':
'value' is the name of the ivar...
- (void)incrementBy:(int)aValue
{
int theOldValue = value;
value = aValue;
if (aValue != theOldValue)
...
}
___________________________________________________________
Ricky A. Sharp mailto:rsh...@instantinteractive.com
Instant Interactive(tm) http://www.instantinteractive.com
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