I want to work with two arrays by comparing them and do some merging of properties:
I have my array1 and array2 as :
array1 = [
{ id: 10, name: 'abc', otherData: 'other' },
{ id: 20, name: 'def', otherData: 'other' },
{ id: 30, name: 'ghi', otherData: 'other' },
];
array2 = [
{ id: 10, nameV2: 'xyz', otherData: 'other' },
{ id: 20, nameV2: 'pqr', otherData: 'other' },
{ id: 30, nameV2: 'tvs', otherData: 'other' },
];
I'm expecting this result where I will compare both arrays, iterate over elements, if id is same then have nameV2 key from array2 in array1's elements
expected output :
array1 = [
{ id: 10, name: 'abc', otherData: 'other', nameV2: 'xyz' },
{ id: 20, name: 'def', otherData: 'other', nameV2: 'pqr' },
{ id: 30, name: 'ghi', otherData: 'other', nameV2: 'tvs' },
];
how to achieve this?
Here's an approach to do this, we create a look-up map(idNameV2Map) using array2 and then use it to get the desired output
const array1 = [{ id: 10, name: 'abc', otherData: 'other' }, { id: 20, name: 'def', otherData: 'other' }, { id: 30, name: 'ghi', otherData: 'other' }];
const array2 = [{ id: 10, nameV2: 'xyz', otherData: 'other' }, { id: 20, nameV2: 'pqr', otherData: 'other' },{ id: 30, nameV2: 'tvs', otherData: 'other' }];
const idNameV2Map = array2.reduce((acc, curr) => {
acc[curr.id] = curr.nameV2;
return acc;
}, {});
const output = array1.map((item) => {
if (idNameV2Map[item.id]) {
return { ...item, nameV2: idNameV2Map[item.id] };
}
return item;
});
console.log(output);Another approach using Array.find()
with conditionally add nameV2 property to the object if it's exist.
const array1 = [{ id: 10, name: 'abc', otherData: 'other' }, { id: 20, name: 'def', otherData: 'other' }, { id: 30, name: 'ghi', otherData: 'other' }];
const array2 = [{ id: 10, nameV2: 'xyz', otherData: 'other' }, { id: 20, nameV2: 'pqr', otherData: 'other' },{ id: 30, nameV2: 'tvs', otherData: 'other' }];
const output = array1.map((item) => {
let objFound = array2.find(obj=>obj.id===item.id);
return { ...item, ...(objFound && {nameV2: objFound.nameV2}) };
});
console.log(output);