Array.forEach线程安全

Question

I am using an array to store a list of connected clients.

Whenever I wish to iterate through the client list I do: clients.forEach(...) .

My question is, is this thread safe, as what if a client disconnects (and is therefore removed from clients ) during the a clients.forEach(...) statement?

Answer 1

Short answer is yes.

forEach is a synchronous process, meaning that the array would not be modified until the process has finished executing the forEach loop on the array.

This is my understanding from reading: Are nodejs data-structures thread-safe by design?