generate a row of Pascal's triangle in linear time and constant space

pascalsTriangleRow.js

function* pascalsTriangleRow(row) {
    let prev = 1;
    for(let i = 1; i <= row; ++i) {
        yield prev;
        prev = (prev * (row - (i - 1))) / i;
    }
    yield 1;
}

Array.from(pascalsTriangleRow(19));