Hi Sanjay, 2015-03-10 14:47 GMT+01:00 Sanjay Minni <s...@planage.com>:
> > sorry folks ... > > so back to terra firma ... > > 1. Is there any way to query an object to finds its index value in the > original collection ... > say when all the objects from a collection are displayed and user clicks on > one item - I want to locate the object back in the collection. Knowing the > index for me would be most efficient. > aCollection indexOf: anElement You will often find this code in list-related gui objects. > > 2. ... also Is there any way to know if I am on the last element ... > aCollection last == anElement > > otherwise I will have to explicitly store the index values ... > If you do it more than once per iteration of the collection, it is probably faster to store the indexes. But I wouldn't do it for anything GUI related; indexOf: is efficient enough. Regards, Thierry
