java 8 group a collections by 2 property
Map<String, Map<BlogPostType, List>> map = posts.stream()
.collect(groupingBy(BlogPost::getAuthor, groupingBy(BlogPost::getType)));java 8 group a collections by 2 property
Map<String, Map<BlogPostType, List>> map = posts.stream()
.collect(groupingBy(BlogPost::getAuthor, groupingBy(BlogPost::getType)));Copyright © 2021 Codeinu
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