in lib/h3core.js [1404:1414]
export function gridDistance(origin, destination) {
const [oLower, oUpper] = h3IndexToSplitLong(origin);
const [dLower, dUpper] = h3IndexToSplitLong(destination);
const countPtr = C._malloc(SZ_INT64);
try {
throwIfError(H3.gridDistance(oLower, oUpper, dLower, dUpper, countPtr));
return readInt64AsDoubleFromPointer(countPtr);
} finally {
C._free(countPtr);
}
}