Here is one way to eliminate the elements in a flat array that exist in a column within an array of objects:
Here's an example code snippet:
const arrayOfObjects = [
{ id: 1, name: 'John' },
{ id: 2, name: 'Jane' },
{ id: 3, name: 'Bob' }
];
const flatArray = [2, 5, 6, 3, 4];
// Extract column values from arrayOfObjects
const columnValues = arrayOfObjects.map(obj => obj.id);
// Convert columnValues into a Set
const columnSet = new Set(columnValues);
// Filter out elements that exist in columnSet
const newArray = flatArray.filter(elem => !columnSet.has(elem));
console.log(newArray); // Output: [5, 6, 4]
In this example, we want to eliminate elements in the flatArray
that match id
values in the arrayOfObjects
. We extract the id
values from the arrayOfObjects
and store them in columnValues
. We convert columnValues
into a Set for faster searching and store it in columnSet
. Finally, we iterate through the flatArray
, check if each element exists in columnSet
using the has()
method, and include it in newArray
only if it doesn't exist in columnSet
. The resulting newArray
has the elements [5, 6, 4]
, which are the elements in the flatArray
that do not exist in the arrayOfObjects
column.
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Asked: 2023-06-01 18:30:41 +0000
Seen: 12 times
Last updated: Jun 01 '23
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