删除json对象中空值

function deleteEmptyProperty(obj){
    var object = obj;
    for (var i in object) {
        var value = object[i];
        if (typeof value === ‘object‘) {
            if (Array.isArray(value)) {
                if (value.length == 0) {
                    delete object[i];
                    continue;
                }
            }
            this.deleteEmptyProperty(value);
        } else {
            if (value === ‘‘ || value === null || value === undefined) {
                delete object[i];
            }
        }
    }
    return object;
}