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src/main/java/ru/akorsa
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README.md
pom.xml

README.md

Original blog post: http://akorsa.ru/2016/12/ispolzuem-tdd-v-java-8-stream/

Learning Java 8 Streaming through Test-Driven development

ToUpperCase (map)

Convert elements of a collection to upper case.

FilterCollection (filter)

Filter collection so that only elements with less then 4 characters are returned.

FlatCollection (flatMap)

Flatten multidimensional collection

OldestPerson (max, comparator)

Get oldest person from the collection

Sum (reduce)

Sum all elements of a collection

Kids (filter, map)

Get names of all kids (under age of 18)

PeopleStats (summaryStatistics)

Get people statistics: average age, count, maximum age, minimum age and sum og all ages.

Partitionaing (partitioningBy)

Partition adults and kids

Grouping (groupingBy)

Group people by nationality

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