[Tutor] R: Re: Re: Re: Class learning

Alan Gauld alan.gauld at btinternet.com
Sat Jan 24 01:47:02 CET 2015

On 24/01/15 00:37, Cameron Simpson wrote:

> By contrast, I use it a far bit (though still far less than non-property
> methods).  Generally for derived properties which are:
>   - cheap to compute i.e. O(1)
>   - which I want to abstract
>   - usually represent some property which is stable, such as a size
>   - occasionally (much more rarely) a property which is not stable,

But why a property rather than a simple method?
Why is

k = url.key

better than

k = url.key()

for meeting those criteria?

Alan G
Author of the Learn to Program web site
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