On 8/29/21 5:02 AM, Mike Parker wrote:
On Sunday, 29 August 2021 at 08:55:44 UTC, realhet wrote:
Is it safe, or do I have to take a snapsot of the keys range like
this? ->
You shouldn't remove anything when iterating over `.keys` or `.values`.
Use `.byKey` and `.byValue` instead to get ranges that are independent
of the aa.
This is exactly the opposite!
The `.keys` property makes a *copy* of all the keys and puts them into
an array. Same thing with `.values`. It is perfectly safe to remove
anything from the associative array while iterating one of those arrays.
The opposite is true for `.byKey` and `.byValue`. Those yield a range
iterating over the actual data in the associative array. Removing an
element while iterating one of those could potentially iterate over null
or stale data, do not do this. While this might work out in some tests,
eventually you will get bit by this, especially if you remove an element
you are currently iterating.
-Steve
