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Menengah Exercism • elixir

PIDs

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# Introduction

About

Each Elixir process has its own unique identifier - a PID (process identifier).

  • PIDs are their own data type.
    • You can check if a variable is a PID with is_pid/1
  • You can get the current process’s PID with self().
  • PIDs function as mailbox addresses - if you have a process’s PID, you can send a message to that process.
  • PIDs are usually created indirectly, as a return value of functions that create new processes, like spawn.
    • PIDs should not be created directly by the programmer. If it were required, Erlang has a list_to_pid/1 function.

Originally from Exercism elixir concepts