pascals-triangle.js

const getPascalsTriangleRow = n => {
  const a = [];
  let x = 0;
  
  for (let i = 0; i < n; i++) {
    x = a.length - i;
    for (let j = 0; j < i + 1; j++)
      (j === 0 || j === i) ? a.push(1) : 
      a.push(a[x + j] + a[x + j - 1]);
  }
  
  return a;
}