Question

1, $.each(a,f);

2,$("a").each(f);

i know the last line meaning, which represents all <a> elements in the document. Then call the each() method then invoke the function f once for each selected element. but i don’t know what’s the meaning of the first one? and what’s the use of it? thank you.

Answer 1

Be careful, in your example a does not need to be the same type of object.

$.each(array, function) is for being used on normal arrays.

The idea behind $(selector).each(function) is the possibility to use the each “operator” on the result of a jQuery selector.

Here are the links to both ways of using each:

http://api.jquery.com/jQuery.each/

http://api.jquery.com/each/