const { INVALID_ROW_COL, OVERFLOW_INDEX } = require('../../Error');
/**
* Gets the entry of a Matrix.
* @memberof Matrix
* @instance
* @param {number} row - Any valid row index
* @param {number} col - Any valid column index
* @returns {number} Entry of the Matrix
*/
function entry(row, col) {
if (!Number.isInteger(row) || row < 0 || !Number.isInteger(col) || col < 0) {
throw new Error(INVALID_ROW_COL);
}
const A = this._matrix;
const [r, c] = this.size();
if (row >= r || col >= c) {
throw new Error(OVERFLOW_INDEX);
}
return A[row][col];
};
module.exports = entry;