jsdataframe.js
function cleanKey(key, dtype) {
  return (
    key === null ? ESCAPED_KEYS.null :
    isUndefined(key) ? ESCAPED_KEYS.undefined :
    dtype === 'date' ? key.valueOf() :
    key
  );
}
function cleanKey(key, dtype) {
  return (
    key === null ? ESCAPED_KEYS.null :
    isUndefined(key) ? ESCAPED_KEYS.undefined :
    dtype === 'date' ? key.valueOf() :
    key
  );
}
function cleanKey ( key , dtype ) { return ( key === null ? ESCAPED_KEYS . null : isUndefined ( key ) ? ESCAPED_KEYS . undefined : dtype === 'date' ? key . valueOf ( ) : key ) ; }
Returns a clean version of the given 'key', transforming if the dtype doesn't hash well directly and escaping if necessary to avoid collisions for missing values
Returns a clean version of the given key transforming if the dtype doesn t hash well directly and escaping if necessary to avoid collisions for missing values