JAVASCRIPT

js copy 2d array

let matrix = [
  [0,0,0,0,0],
  [0,0,0,0,0],
  [0,0,0,0,0],
  [0,0,0,0,0],
]
// copies just values, not references!
function getCopyOfMatrix(mat) {
  return mat.map(row => row.map(col => col))
}

let copyOfMatrix = getCopyOfMatrix(matrix); 

js copy 2d array

let matrix = [
  [0,0,0,0,0],
  [0,0,0,0,0],
  [0,0,0,0,0],
  [0,0,0,0,0],
]
// copies just values, not references!
function getCopyOfMatrix(mat) {
  return JSON.parse(JSON.stringify(mat))
}

let copyOfMatrix = getCopyOfMatrix(matrix); 

javascript copy 2d array

function copy2DArray(array) {
    return array.map(row => [...row]);
}