You have to remove all duplicate elements from the internal arrays of the given 2-D array.
2-D Array
[[1,2,3,8,1,2], [54,26,14,54], [81,4,6,84]]
Internal arrays
[1,2,3,8,1,2], [54,26,14,54] and [81,4,6,84]
So the output should be something along the lines of
[[1,2,3,8],[54,26,15],[81,4,6,84]]
Code:
var twoD = [[1,2,3,8,1,2], [54,26,14,54], [81,4,6,84]];
function deleteDuplicate (twoD) {
let uniqueArr = []; //init empty array
for(var i=0;i<twoD.length;i++){
for(let j of twoD[i]) {
if(uniqueArr.indexOf(j) === -1) {
uniqueArr.push(j);
}
}
}
return uniqueArr;
}
console.log(deleteDuplicate(twoD));My code returns a single array with [1,2,3,8,54,26,15,81,4,6,84] as values.
I know the issues lie in the pushing but I am unable to think of anyway, how should I do it?
Answer
You can use Set.
const arr = [[1,2,3,8,1,2], [54,26,14,54], [81,4,6,84]];
function beUnique(arr){
const res = arr.map((a)=>{
const unique = new Set(a);
return Array.from(unique);
});
console.log(res);
}
beUnique(arr);