Scala 面试题与答案
问题 6. What are the advantages of using the 'Option' type over null in Scala?
Using 'Option' type forces the developer to handle the absence of a value explicitly, reducing the likelihood of null pointer exceptions. It leads to safer and more robust code.
问题 7. Explain the 'yield' keyword in the context of Scala collections.
In the context of Scala collections, 'yield' is used within a 'for' comprehension to produce elements for the resulting collection. It is often used for transforming and filtering data.
问题 8. What is the 'View' in Scala collections?
The 'View' in Scala collections provides a lazy and non-strict version of a collection. It allows you to create a lightweight view on a collection without creating a new data structure.
问题 9. How does Scala support multiple inheritance?
Scala supports multiple inheritance through the use of traits. A class can extend multiple traits, allowing it to inherit behavior from each of them.
问题 10. What is the purpose of the 'withFilter' method in Scala?
The 'withFilter' method is used in conjunction with 'for' comprehensions to enable lazy filtering of elements in a collection. It is similar to 'filter' but is evaluated lazily.
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