El 17/01/2012 23:32, Timon Gehr escribió:
On 01/17/2012 11:19 PM, Alvaro wrote:
El 17/01/2012 18:24, Andrei Alexandrescu escribió:
On 2012-01-17 06:48:26 +0000, Andrei Alexandrescu
...
aa.keys is taken btw.
OK, I see, .keys and .values currently return dynamic arrays.
But the most appropriate property name for the above range should indeed
be .keys !
Now, wouldn't it be be better to turn .keys into the proposed range?
Let's see. What is the use of .keys?
I searched phobos and found that .keys is mostly used to itarate over
the keys in a foreach loop. With the problem that is needs to allocate a
dynamic array. If silently changed to the proposed range, the foreach
loop would do the same and without an allocation.
In a few unittests, .keys is followed by .sort, usually to print the
keys in order. That would not work... unless the produced range includes
a .sort method. Alternatively a .sortedKeys property can be added.
The other use I see in phobos is just a typeof(a.keys[0]), which could
be replaced by typeof(a.keys.front)
What is the benefit of .keys as a range? it does not allocate an array,
just gives the keys.
And if an array is needed, it is easy to turn a range into an array.
[Well, I'm missing a more direct way of doing that than using foreach
and appending]
See std.array.array.
Oops. Yes, thanks.
So, not bad. In those [infrequent, I'd say] cases needing an array one
would do:
auto keys = array(aa.keys);
even: (unsure if this would work, but somethig similar maybe)
foreach(k; array(aa.keys).sort)
{
... use the ordered keys
}
