[R] beginner questions: objects and scripts

[Terry Mu]

hi,

I got some questions on using R,

1. How do I check and edit definition of an object?

for example,

>x <- 1:100

then after a while I want to check how x is defined.

list(x) or whatever functions I know only list its
content, but I want to see its definition, without
scrolling up and down, and edit it like "fixing" a
function.

2. How to save my work in current session as a nice
script?

again, I want to save objects as they are defined, not
numbers, other than copy / paste. I tried dump(), etc.
In another word, how do you work with R?

Thanks,
Terry