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Distributed Computing with Go by V.N. Nikhil Anurag

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Parallelism

Imagine that you have to write a few emails. They are going to be long and laborious, and the best way to keep yourself entertained is to listen to music while writing them, that is, listening to music "in parallel" to writing the emails. If we wanted to write a program that simulates this scenario, the following is one possible implementation:

package main import ( "fmt" "sync" "time" ) func printTime(msg string) { fmt.Println(msg, time.Now().Format("15:04:05")) } // Task that will be done over time func writeMail1(wg *sync.WaitGroup) { printTime("Done writing mail #1.") wg.Done() } func writeMail2(wg *sync.WaitGroup) { printTime("Done writing mail #2.") wg.Done() } func writeMail3(wg *sync.WaitGroup) { printTime("Done writing ...

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