lambda集合用法
    Lambda Collections in Java and C#。
    Lambda collections are a powerful tool that allows developers to work with collections in a more concise and expressive way. They provide a way to define anonymous functions that can be used to filter, map, and reduce collections.
    Java.
    In Java, lambda expressions are defined using the following syntax:
    (parameters) -> expression.
    For example, the following lambda expression filters a list of numbers to only include even numbers:
    List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
    List<Integer> evenNumbers = numbers.stream().filter(n -> n % 2 == 0).List());
    The following lambda expression maps a list of strings to their lengths:
    List<String> words = Arrays.asList("apple", "banana", "cherry", "dog", "elephant");
    List<Integer> wordLengths = words.stream().map(word -> word.length()).List());
    The following lambda expression reduces a list of numbers to a single sum:
    int sum = numbers.stream().reduce(0, (a, b) -> a + b);
    C#。
    In C#, lambda expressions are defined using the following syntax:
    (parameters) => expression.
    For example, the following lambda expression filters a list of numbers to only include even numbers:python中lambda怎么使用
    var numbers = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
    var evenNumbers = numbers.Where(n => n % 2 == 0).ToList();
    The following lambda expression maps a list of strings to their lengths:
    var words = new List<string> { "apple", "banana", "cherry", "dog", "elephant" };
    var wordLengths = words.Select(word => word.Length).ToList();
    The following lambda expression reduces a list of numbers to a single sum:
    var sum = numbers.Aggregate(0, (a, b) => a + b);
    Benefits of Using Lambda Collections.
    Lambda collections offer a number of benefits over traditional collection manipulation tec
hniques. They are:
    Concise: Lambda expressions are much more concise than traditional collection manipulation techniques. This can make code easier to read and understand.
    Expressive: Lambda expressions are more expressive than traditional collection manipulation techniques. This can make code more readable and maintainable.
    Functional: Lambda expressions allow developers to write code in a more functional style. This can make code more modular and reusable.
    Conclusion.
    Lambda collections are a powerful tool that can help developers work with collections in a more concise, expressive, and functional way. They are a valuable addition to any developer's toolbox.

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