this is my array
export const someList = {
something1: 'some string 1',
someArr: [
{
item: 'item 1',
},
},
{
item: 'item 2',
},
},
{
item: 'item 3',
},
],
something2: {
some: 'some string 2'
},
};
Ok, so what I am trying to achieve is to construct a new array that would look like this:
export const newList = {
something1: 'some string 1',
someArr: [
{
item: 'item 1',
},
},
{
item: 'item 2',
},
],
something2: {
some: 'some string 2'
},
};
So everything remains the same, except that newList takes only first two items from someArr.
I have tried this and it works correctly, but I don't know how to keep "outer" parts in new array (something1 and something2).
const newList = someList.someArr.slice(0, 2)
How can I construct a new array, keeping what I want, but still slicing the items from deeper nested array?
Thanks.
Ok after comments I re-read question I think you are trying to make a new OBJECT not a new ARRAY (curly braces are an object).
So with your code to do an OBJECT deep copy, then change the inside array, it will look like:
export const someList = {
something1: 'some string 1',
someArr: [
{
item: 'item 1',
},
},
{
item: 'item 2',
},
},
{
item: 'item 3',
},
],
something2: {
some: 'some string 2'
},
};
let newList=JSON.parse(JSON.stringify(someList));
newList.someArr=newList.someArr.slice(0,2);
What Event_Horizon answered is correct.
Another way of creating new Object:
const someList = {
something1: 'some string 1',
someArr: [
{
item: 'item 1',
},
{
item: 'item 2',
},
{
item: 'item 3'
}
],
something2: {
some: 'some string 2'
},
};
let newList={...someList,someArr:someList.someArr.slice(0,2)}
console.log(newList)