Ruby中有限的矩阵 [英] Limited matrices in Ruby

问题描述

为什么Matrix类没有方法来编辑其向量和成分?矩阵中的所有内容似乎都可以读取但不能写入.我错了吗?是否有一些类似于第三方的Matrix优雅类，可以让我删除行并有意对其进行编辑?

How come the Matrix class has no methods to edit its vectors and components? It seems like everything inside a matrix can be read but not written. Am I mistaken? Is there some third-party elegant Matrix-like class that would allow me to delete rows and intentionally edit them?

如果没有此类课程，请通知我-我将停止搜索.

Please, notify me if there is no such class – I will stop searching.

推荐答案

类Matrix的设计者必须是不变数据结构和函数式编程的爱好者.是的，您是正确的.

The designer of class Matrix must have been a fan of immutable data structures and functional programming. Yes, you are correct.

在任何情况下，都有您想要的简单解决方案.使用Matrix可以执行的操作，然后只需使用.to_a即可获取真实数组.

In any case, there is a simple solution for what you want. Use Matrix for what it can do, then, just use .to_a to get a real array.

>> Matrix.identity(2).to_a
=> [[1, 0], [0, 1]]

另请参见数字Ruby Narray .您也可以在该类上添加猴子补丁以添加更多行为.如果这样做，请修补Matrix的子类. (那里的Ruby库项目希望从require d类获得更多的行为，因此它们可以直接对其进行修改，从而使它们的新文件有毒.可以很容易地修补子类或单例类.)

See also Numerical Ruby Narray. You could also monkeypatch the class to add more behavior. If you do this, please patch a subclass of Matrix. (There are Ruby library projects out there that want more behavior from required classes so they directly modify them, making their new files somewhat toxic. They could have so easily just patched a subclass or singleton class.)

哦，和 khelll (:-)可能想让我说，您很有可能找到一种方法以功能样式完成您想要的事情.也就是说，通过创建新对象而不是通过修改旧对象.

Oh, and khelll (:-) would probably like me to say that there is quite possibly a way for you to do what you want in a functional style. That is, by creating new objects rather than by modifying the old ones.

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