isEmpty.js #1

define(['../object/forOwn', './isArray'], function (forOwn, isArray) {

    function isEmpty(val){
        if (val == null) {
            // typeof null == 'object' so we check it first
            return true;
        } else if ( typeof val === 'string' || isArray(val) ) {
            return !val.length;
        } else if ( typeof val === 'object' ) {
            var result = true;
            forOwn(val, function(){
                result = false;
                return false; // break loop
            });
            return result;
        } else {
            return true;
        }
    }

    return isEmpty;

});