isEmpty.js•626 B
define(['./isArray', './keys', './_getLength', './isArguments', './isString'], function (isArray, keys, _getLength, isArguments, isString) {
// Is a given array, string, or object empty?
// An "empty" object has no enumerable own-properties.
function isEmpty(obj) {
if (obj == null) return true;
// Skip the more expensive `toString`-based type checks if `obj` has no
// `.length`.
var length = _getLength(obj);
if (typeof length == 'number' && (
isArray(obj) || isString(obj) || isArguments(obj)
)) return length === 0;
return _getLength(keys(obj)) === 0;
}
return isEmpty;
});