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Java lambda expressions hackerrank solution
Lambda expressions in Java are often tested on platforms like HackerRank to assess candidates’ understanding of functional programming concepts. While specific questions may vary, here are some common types of HackerRank questions related to Java lambda expressions:
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1. Basic Lambda Syntax:
— Write a lambda expression to sort a list of integers in ascending order.
— Create a lambda function to filter even numbers from a list of integers.
2. Using Lambda with Streams:
— Given a list of strings, use lambda expressions to find strings containing a specific substring.
— Calculate the sum of squares of even numbers in a list using lambda expressions and streams.
3. Functional Interfaces:
— Implement a custom functional interface and use it with lambda expressions to perform mathematical operations.
— Write a lambda function to check if a string is a palindrome.
4. Method References:
— Convert lambda expressions to method references where applicable.
— Implement a Comparator using lambda expressions and method references to sort a list of objects.
