JavaScript Get Indexes based from the Selected Array of Object Id

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Today, I'm trying to get the list of javascript index based from the selected data id that I have.

I'm following this guide from https://buefy.org/documentation/table/#checkable where it needs something like this: checkedRows: [data[1], data[3]] to able to check the specific row in the table.

What I need to do is to check the table based from my web API response.

I have this sample response data.

response.data.checkedRows // value is [{id: 1234}, {id: 83412}]

and I have the sample data from the table.

const data = [{
    id: 1234,
    name: 'Jojo'
},{
    id: 43221,
    name: 'Jeff'
},{
    id: 83412,
    name: 'Kacey'
}]

So basically, I need to have something, dynamically, like this: checkedRows: [data[0], data[2]] because it matches the data from the response.data.checkedRows

So far, I tried using forEach

let selectedIndex = [];
response.data.checkedRows.forEach((d) => {
     this.data.forEach((e) => {
         if (d.id=== e.id) {
             // need the result to be dynamic depending on the response.data.checkedRows
             this.checkedRows = [data[0], data[2]]
         }
     });
});

I'm stuck here because I'm not sure how can I get the index that matches the selected checkedRows from response. Any help?

arrays javascript
1 Answers

Map the response checkedRows, and in the callback, .find the matching object in the array:

const checkedRows = [{id: 1234}, {id: 83412}];

const data = [{
    id: 1234,
    name: 'Jojo'
},{
    id: 43221,
    name: 'Jeff'
},{
    id: 83412,
    name: 'Kacey'
}];

const objs = checkedRows.map(({ id }) => (
  data.find(obj => obj.id === id)
));
console.log(objs);

If there are a lot of elements, you can use a Set of the IDs to find instead to decrease the computational complexity:

const checkedRows = [{id: 1234}, {id: 83412}];

const data = [{
    id: 1234,
    name: 'Jojo'
},{
    id: 43221,
    name: 'Jeff'
},{
    id: 83412,
    name: 'Kacey'
}];

const ids = new Set(checkedRows.map(({ id }) => id));
const objs = data.filter(obj => ids.has(obj.id));
console.log(objs);

user_95152070
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