[英]Is Array.push() mutating the array?
I am doing:我在做:
const array = []
...
array.push({x, y})
Is that considered a bad practise.这被认为是一种不好的做法。 Should I use let or spread the array because "push" is considered a mutating action.
我应该使用 let 还是传播数组,因为“push”被认为是一种变异动作。 It is working though.
它正在工作。
Is Array.push() mutating the array?
Array.push() 是否在改变数组?
Yes是的
Is that considered a bad practise.
这被认为是一种不好的做法。 Should I use let or spread the array because "push" is considered a mutating action.
我应该使用 let 还是传播数组,因为“push”被认为是一种变异动作。
Generally not.一般不会。
There are times when treating data as immutable is useful, or even essential (such as when you are updating a Redux store).有时将数据视为不可变是有用的,甚至是必不可少的(例如当您更新 Redux 存储时)。
In those cases, push
still isn't a bad idea, you just shouldn't do it to your original array.在这些情况下,
push
仍然不是一个坏主意,您只是不应该对原始数组执行此操作。
For example, this is fine and has no side effects:例如,这很好并且没有副作用:
function functionalFunction(input) {
const output = [...input];
output.push({x, y});
// A bunch of other operations that mutate the array go here
// Be careful not to mutate any objects in the array
return output;
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.