Step1 stream lambda optional - #1

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Woomin-Jeon wants to merge 9 commits into

itaewon-coding-dojo:woomin-Jeonfrom

Woomin-Jeon:step1-stream-lambda-optional

Commits on Jun 25, 2020

Convert anonymous Class to lambda
Woomin-Jeon
committed
176d225

Commits on Jun 29, 2020

Commits on Jun 30, 2020

Make ageIsInRange2() method by using Optional
Woomin-Jeon
committed
f36ceba
Make getUser() by using orElse() method
Woomin-Jeon
committed
b03a00b
Make of() method by using lambda and orElseThrow()
Woomin-Jeon
committed
ba68db6