jsdataframe.js
function numClose(x, y) {
  return (Number.isNaN(x) && Number.isNaN(y)) ||
    Math.abs(x - y) <= 1e-7;
}
function numClose(x, y) {
  return (Number.isNaN(x) && Number.isNaN(y)) ||
    Math.abs(x - y) <= 1e-7;
}
function numClose ( x , y ) { return ( Number . isNaN ( x ) && Number . isNaN ( y ) ) || Math . abs ( x - y ) <= 1e-7 ; }
Returns true if x and y are within 1e-7 tolerance or are both NaN
Returns true if x and y are within 1e - 7 tolerance or are both NaN