ohwelppp questions

• Cannot checkout branch or remove problematic files
• Returning List of values with max property using Comparator
• Stream groupingBy with flatmap
• Java 8 stream - how to properly make NPE-safe stream
• Id field as long type
• H2 console and Spring Security - permitAll() not working
• Java 8: replace anonymous class with lambda
• Using repository annotation when implementing JpaRepostiory in Spring
• Need explanation for algorithm searching minimal large sum
• Using Quartz with Spring Boot 2

ohwelppp answers