Concurrency

Goroutines

• include ‘go’ infront of function to make it run async.
• go funcName()

sync package

allows the use of wait groups that empower us to include multiple goroutines into a single wait group and we can then do something once all those are complete.

  import "sync"
  var wg sync.WaitGroup
  wg.Add(1)
  wg.Wait()
  wg.Done()

• Video Tutorial source

Defer statement

defines that something should only run after the rest of the function is complete. * first in is last out if there are multiple defer statements. * defer is a statement so it is included before the rest of the statement. * defer statement runs even if the program panics.

defer fmt.Println("something")

defer wg.Done()