You could currently do
```js
object.child.property /= 5
```
with destructuring:
```js
const {child: {subchild}, child} = state;
return {
...state,
child: {
...child,
subchild: {
...subchild,
property: subchild.property + 1
}
}
}
```
or do-expressions:
```js
return {
...state,
child: do {
const {child} = state;
return {
...child,
subchild: do {
const {subchild} = child;
return {
...subchild,
property: subchild.property + 1
};
}
};
}
}
```
note: your `property: itself + 1` looks incorrect, since you probably mean
to increment the `property` property
On Fri, Sep 6, 2019 at 9:36 AM Imeian . <[email protected]> wrote:
> When we need to change a value using the old value :
>
> variable = itself + 5 // instead of
> variable = variable + 5
>
> object.child.property = itself / 5 // instead of
> object.child.property = object.child.property / 5
>
> Changing a value in nested objects is a pain, like Redux states for eg.
>
> return {
> ...state,
> child: {
> ...state.child,
> subchild: {
> ...state.child.subchild,
> property: state.child.subchild.property + 1
> }
> }
> }
>
> would then be
>
> return {
> ...state,
> child: {
> ...itself,
> subchild: {
> ...itself,
> property: itself + 1
> }
> }
> }
>
>
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>
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