oop - 依赖/依赖是什么意思？

Question

http://tutorials.jenkov.com/ood/understanding-dependencies.html#whatis说(强调我的):

Whenever a class A uses another class or interface B, then A depends on B. A cannot carry out it's work without B, and A cannot be reused without also reusing B. In such a situation the class A is called the "dependant" and the class or interface B is called the "dependency". A dependant depends on its dependencies.

根据谷歌的定义:

a dependent or subordinate thing, especially a country or province controlled by another.

由于 A 依赖于 B，因此依赖项是 A，从属项是 B。这与第一个引用相反。或者我错过了什么？

Answer 1

术语取决于上下文。一般来说，依赖是依赖的同义词，它描述的不是一个实体，而是状态。根据Cambridge dictionary :

一直需要某物或某人的情况，尤其是为了继续存在或运营。

所以它更多地是关于与某事的关系。例如:

A minor child is dependent of his/her parents. The child is in a state of dependency. The dependency describes the relation between the child and its parents.

google 定义只是可用定义之一(例如参见 Collins dictionary)，该定义特别适用于地缘政治和房地产领域。例如:

Before 1776, America was a dependency of the British Empire. The dependency America was dependent on the Empire.

He bought a farm with several dependencies

面向对象的术语与更一般的定义没有太大区别:依赖是对象或类之间的关系。这是来自 UML 2.5 标准的更正式的定义:

7.7.1: A Dependency signifies a supplier/client relationship between model elements where the modification of a supplier may impact the client model elements.

因此，重申教程中的内容，我们可以说:

If A has to use B, A depends on B. There is a relation of dependency from A to B. A is said to be the dependent.

出于实际原因和 语言便利 , B 通常被称为依赖(这确实与日常语言相反)。但实际上，依赖关系仍然是A与B的关系。