I was looking this post about best practices of jquery jquery-pitfalls-to-avoid in one of the answers someone said about the good uses of context in a selector and quotes a examples like this
var ct = $('#container');
$('.myClass',ct)
With the finally to explain that this will find in the context of the container
and not in all the document. Now my question if that code is not the same that this function
var ct = $('#container');
ct.find('.myClass')