问题：
I am currently working on React JS and React Native frameworks.我目前正在研究React JS和React Native框架。 On the half way road I came across Immutability or the Immutable-JS library , when I was reading about Facebook's Flux and Redux implementation.在半路上，当我阅读 Facebook 的 Flux 和 Redux 实现时，我遇到了 Immutability 或Immutable-JS 库。
The question is, why is immutability so important?问题是，为什么不变性如此重要？ What is wrong in mutating objects?改变对象有什么问题？ Doesn't it make things simple?这不是让事情变得简单吗？
Giving an example, let us consider a simple News reader app with the opening screen being a list view of news headlines.举个例子，让我们考虑一个简单的新闻阅读器应用程序，它的打开屏幕是新闻标题的列表视图。
If I set say an array of objects with a value initially I can't manipulate it.如果我设置了一个初始值的对象数组，我将无法操作它。 That's what immutability principle says, right?这就是不变性原则所说的，对吧？ (Correct me if I am wrong.) But, what if I have a new News object that has to be updated? （如果我错了，请纠正我。）但是，如果我有一个新的 News 对象需要更新怎么办？ In usual case, I could have just added the object to the array.通常情况下，我可以将对象添加到数组中。 How do I achieve in this case?在这种情况下我如何实现？ Delete the store and recreate it?删除商店并重新创建它？ Isn't adding an object to the array a less expensive operation?将一个对象添加到数组中不是一个成本较低的操作吗？
解决方案：
参考一： https://en.stackoom.com/question/2KHAh参考二： https://stackoom.com/question/2KHAh