Function getCellAtIndex

src/algorithms/math/matrix/Matrix.js:211–221

(m, cellIndices)

 * @return {Cell}
 */
export const getCellAtIndex = (m, cellIndices) => {
  // We start from the row at specific index.
  let cell = m[cellIndices[0]];
  // Going deeper into the next dimensions but not to the last one to preserve
  // the pointer to the last dimension array.
  for (let dimIdx = 1; dimIdx < cellIndices.length - 1; dimIdx += 1) {
    cell = cell[cellIndices[dimIdx]];
  }
  // At this moment the cell variable points to the array at the last needed dimension.
  return cell[cellIndices[cellIndices.length - 1]];
};

/**
 * Update the matrix cell at specific index.