When I try to iterate over an array and assign each element to its appropriate position in a matrix, the entire column is being updated instead of only the specific data point I am trying to modify.
I expected
[ [ 'a', 'b' ], [ 'c', 'd' ], [ 'e' ] ]
But instead got
[ [ 'e', 'd' ], [ 'e', 'd' ], [ 'e', 'd' ] ]
function chunkArrayInGroups(arr, size) {
const matrix = new Array(Math.ceil(arr.length / size)).fill([])
for (let i = 0; i < arr.length; i++) {
let row = Math.floor(i / size)
let col = i % size
console.log(`matrix[${row}][${col}]`)
matrix[row][col] = arr[i]
}
console.log(matrix)
return matrix
}
console.log(
chunkArrayInGroups(["a","b","c","d","e"],2)
)
