I had posted a lot of questions asking the same question and problem arise due to not able to pass my parameter or values in the apex:repeat back to controller many times but to no avail, no response, no reply, no solution. 

I kind of giving up in learning this language. Before I quit, I really wish to understand how can this works, how can I pass a parameter back to controller WITHOUT THE USE of commandlink or any functions but only by

My list is like this  List<String> something{get;set;} // ["I have something", "I got something"]

I wanted to save each of the value inside the list "something" to <String> some // I have to pass the List"something" to VF page before passing it back from VF page to controller, this is my requirement. 

I then try to pass it to VF page:

<apex:repeat value="!something" var="s">
<apex:param value="!s" assignTo="{!some}"> // this has been create in controller <String>something {get;set;}
</apex:repeat>

My question, why I cant pass the value back to my controller? I try this method but nothing is stored in "some". I still do not know why. Many said use rerender but this "rerender" is only in function or commandlink, BUT I DO NOT WANT TO use these links. I just want to pass the parameter without any buttons or anything.

Please help. Its my final trial and its urgent! Thank you so much