Feature to get or add value to an associative array.

[Giles Bathgate]

On Sunday, 15 April 2018 at 22:55:41 UTC, Giles Bathgate wrote:
> Time for a bikeshed discussion...

I have had some thoughts about the name and would like to share 
my idea.

Firstly to summarise here are the names that have been 
found/discussed so far:

C#                   : GetOrAdd
Java                 : computeIfAbsent
Python               : setdefault
Rust                 : entry(key).or_insert_with

Jordan Wilson        : getOrAdd, getOrSet
User1234             : valueOrDefault
Nicholas Wilson      : getOrInsert
Steven Schveighoffer : getPtr, getRef, getInitialized
Nick Treleaven       : slot
MrSmith              : getOrCreate

My latest idea is just a working title, but I think I prefer it 
to my original getOrAdd.

Giles Bathgate       : require

My thinking is that if you `require` there to be a value in the 
associative array, then you should have the ability to add one 
iff it doesn't exist. It name also has parallels with the term in 
other programming languages to require a module, meaning to 
import it if it hasn't already been loaded.