[英]Which is Best .toJS() vs .toJSON() in immutable js?
I am new to React+Redux+Immutable js ,I am using toJS() to tranforming my Immutable Data structure to Native javascript form.But Recently I stumbleupon with this tweet 我是React + Redux + Immutable js的新手,我使用toJS()将我的不可变数据结构转换为原生javascript格式。但最近我用这条推文恍恍惚惚
Author of Immutable.Js Immutable.Js的作者
Tweet says .toJS() is very expensive So can i go with toJSON() https://facebook.github.io/immutable-js/docs/#/List/toJSON is it ok with perf issue Tweet说.toJS()非常昂贵所以我可以使用toJSON() https://facebook.github.io/immutable-js/docs/#/List/toJSON是否可以使用perf问题
UPDATE UPDATE
const initialState = fromJS({
postArr:[]
});
const mapStateToProps = (state) => {
return{
posts:state.allPosts.toJS()
}
};
Pls provide some example with my own Reducer 请用我自己的Reducer提供一些示例
How can i iterate this.props.posts
without using to.js() 如何在不使用to.js()的情况下迭代this.props.posts
From what I understand from the documentation : 根据我从文档中理解的内容 :
toJSON()
returns a shallowly copied version of the immutable object (not a JSON string , although the name might suggest otherwise), which should only be used to pass to JSON.stringify()
(in other words: you shouldn't use it as a regular object in your code). toJSON()
返回一个浅层复制的不可变对象版本(不是JSON 字符串 ,虽然名称可能另有建议),它只能用于传递给JSON.stringify()
(换句话说:你不应该使用它作为代码中的常规对象)。
toJS()
returns a deeply copied version of the immutable object, which you can subsequently use/modify in your code. toJS()
返回一个深度复制的不可变对象版本,您可以随后在代码中使用/修改它。 Because it's a deeply copied version, it's more expensive to generate. 因为它是一个深度复制的版本,所以它的生成成本更高。
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