hi, who has idea how to list a plain object array like this style?

hi, who has idea how to list a plain object array like this style?

var ShoppingCat = {};
ShoppingCat.Array = [];

ShoppingCat.Array['a'] = 'b';
ShoppingCat.Array['c'] = 'd';
ShoppingCat.Array['e'] = 'f';

but if use $.each(ShoppingCat.Array, function(k,v) {}) ,it seems error?
somebody knows how to fix? thanks