Learning about ES6 destructuring is still new to me. I have encountered a scenario where I need to extract specific values from a nested object within an object.
For instance -
z = {g: 1, h: 2, i: {d1:5, d2:6, d3:7}}
When attempting to destructure with:
let { g, i : {d1, d3}, ...less } = z
The less variable excludes d2 and only contains h.
I am trying to find a way to achieve the desired result of:
less = {h, i : {d2}}
Sorry, there isn't one solution for that. However, you can try the following:
const { a, b: { c1, c3, ...rest2 }, ...rest } = x;
const rest = { ...rest, b: rest2 };
This code snippet extracts the remaining values and then combines them together while keeping the original structure intact.
Regrettably, achieving this is not within reach.
However, the missing values from i can be extracted using a second rest spread:
let z = {g: 1, h: 2, i: {d1:5, d2:6, d3:7}};
let { g, i : {d1, d3, ...i_less}, ...rest_less } = z;
let less = { i: i_less, ...rest_less };
console.log(less)Here's a different approach that may be useful.
const obj = {
x: 1,
y: 2,
z: {
a: 5,
b: 6,
c: 7
}
}
const {x, z: {a, c, ...rest1}, ...rest2} = obj
const rest = {
z: rest1,
...rest2
}
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