shift matrix in javascript

To shift a matrix in javascript, you can use the shift() method of the Array object. This method removes the first element from an array, and shifts all other elements down by one index.

However, since a matrix is an array of arrays, you need to apply the shift() method to each inner array one by one. Here's an example function that shifts a matrix by one position to the left:

index.tsx
function shiftMatrix(matrix) {
  for (let i = 0; i < matrix.length; i++) {
    matrix[i].shift();
  }
  return matrix;
}
121 chars
7 lines

This function iterates over each inner array of the matrix, and applies the shift() method to remove the first element. When all inner arrays have been shifted, the function returns the modified matrix.

To shift a matrix by one position to the right, you can use the pop() method instead of shift(), and add a new element to the end of each inner array:

index.tsx
function shiftMatrixRight(matrix) {
  for (let i = 0; i < matrix.length; i++) {
    matrix[i].pop();
    matrix[i].push(0); // or any other new element
  }
  return matrix;
}
175 chars
8 lines

This function iterates over each inner array of the matrix, and applies the pop() method to remove the last element. It then adds a new element to the end of each inner array using the push() method. When all inner arrays have been shifted, the function returns the modified matrix.