ES6 / Typescript: Stacking map and filter advanced array methods

Ionic Framework ionic-v3
13

Lodash has a deepClone method. I think that should be much better than mine.
https://lodash.com/docs/#cloneDeep

It supports all kind of features and can also clone complex structures. But it is slower compared to JSON.
The library owner describes it here:

You can install lodash to your project with:
npm i -S lodash
npm i -D @types/lodash

There is also a smaller version
npm i -S lodash.clonedeep
But i don’t know if the types are working for it.

It really depends on what you are doing. If you know exactly the data structure and it is not that big, I would use the spread operator for cloning, if performance is very important.

const obj = {
  a: {
    b: {
      c: {
        d: 'd',
        dd: 'dd'
      },
      cc: 'cc'
    },
    bb: 'bb'
  },
  aa: 'aa'
};

const objCopy = {
  ...obj,
  a: {
    ...obj.a,
    b: {
      ...obj.a.b,
      c: {
        ...obj.a.b.c,
      }
    }
  }
};