目录1. 基本概念2. python 中的特性3. 函数式编程的实践4. 结论函数式编程（Functional Programming）是一种编程范式，它将计算视为函数的求值，并且避免使用可变状态和循环。
Today I was reading through some Hibernate code and I encounter something interesting. There is a class called CollectionHelper that defines the following constant varibale:
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