README.md

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"It is far easier to design a class to be thread-safe than to retrofit it for thread safety later."

(Brian Goetz - Java concurrency: Publisher: Addison-Wesley Professional, Year: 2006; 2013)

Coroutine

A coroutine is Kotlin's way of tackling asynchronous operations, multi-threaded programming
or manging concurrency.
According to Coroutine Team, Java threads have below problems:

• Context switching for thread can be a costly operation;
• Various the various OS does restrict the number of threads created by per app. They can
  be infinite;
• There are still a few platforms that do not support threads (JavaScript);
• It's always difficult to debug threads;
• Dealing with race conditions can be a nightmare.

=> Coroutine has answered all the above problems & it also runs in parallel.

Used Software Info:

Kotlin v1.6, IntelliJ IDEA Education Edition, JDK 1.8

References

• https://github.com/Kotlin/kotlinx.coroutines

• Anko-Coroutines: https://github.com/Kotlin/anko/wiki/Anko-Coroutines