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Removing duplicate values in a twodimensional array in JavaScript
We are required to write a JavaScript function that takes in a two-dimensional array of literals.
Our function should return a new array that contains all the entries from the original array but the repeating ones.
Example
The code for this will be −
const arr = [
[1,2,3,4,5],
[3,4,6,7,8,2],
[7,2,4,9,11,15],
[10,12,3,7,11]
];
const removeDuplicates = arr => {
let map = {};
let res = [];
res = arr.map(el => {
return el.filter(val => {
if(map[val]){
return false;
};
map[val] = 1;
return true;
});
});
return res;
};
console.log(removeDuplicates(arr));Output
The output in the console −
[ [ 1, 2, 3, 4, 5 ], [ 6, 7, 8 ], [ 9, 11, 15 ], [ 10, 12 ] ]
Updated on: 12-Oct-2020
1K+ Views
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