[jQuery] $(' Expert jQuery & JS synatx ' ).show

[Ami]

Sorry about my grammar, English isn't my lang.

I am trying to write code like that:
        var expr=true,selector='div';
        $(selector) (expr ? .next() : .before() ). show();

But it's not JS syntax. So how can I do it?

I know,that I can do it like that:
        if (expr) $(selector)..before(),show() else $(selector).next().show()


But I am trying to find a solution, that return a jQuery object.

Thank you.