function isAbsoluteArray(path) {
  return isPathArray(path)
    // `isPathArray` also checks if it's `Array`
    && path.every(([x]) => x === x.toUpperCase());
}
Iterates an array to check if it's a `pathArray`
with all absolute values.

@param {string | SVGPath.pathArray} path the `pathArray` to be checked
@returns {boolean} iteration result