Function isArraylike

2.0.3/Core.js:853–868

(obj)

    });

    function isArraylike(obj) {
        var length = obj.length,
            type = jQuery.type(obj);

        if (jQuery.isWindow(obj)) {
            return false;
        }

        if (obj.nodeType === 1 && length) {
            return true;
        }

        return type === "array" || type !== "function" &&
            (length === 0 ||
            typeof length === "number" && length > 0 && (length - 1) in obj);
    }

    // All jQuery objects should point back to these
    rootjQuery = jQuery(document);