Question

I have a mutable array that contains the sounds that are being played.

I have a continous process that parse that array to adjust volumes and some other things.

Sometimes, a new sound is played and must be added to that array just before it’s play starts.
And sometimes, I have a crash because my array “was mutated while being enumerated”.

How may I solve that ?

Answer 1

You can’t easily change an array while it’s enumerating.

Enumerate through the array and note the new sound to be added (using a variable, or a separate array if you need to note more than one). When the enumeration is finished, add the sound to the array.

Alternatively, make a copy of the array, enumerate the copy and add the sound to the original one when you need to.