Dating Objects

I'm trying to carryout the equivalent of ls -l in R
to give some date/time label to each of my objects

If the case is that there is no equivalent, is it
possible to list all objects in an environment that
share a common component so that the common component
is also displayed?

I'm attempting to do the following

object$time <- Sys.time()

for every object i've created which although tedious
appears to work

However I've no idea how if it is possible to list all
the objects by $time or extract the object name & $time
from all objects simultaneously so I can compare them.

Or am I just wasting my time?

## Create some objects
xx <- "adsfasdf"
zz <- 3027
yy <- "abdsf"

## Assign a time attribute to them.
attr(zz, "time") <- Sys.time()
attr(yy, "time") <- Sys.time()

## To see the time attribute of, for example, zz:
attributes(zz)$time

## A crude function to show the time attributes
## of objects:

time.attr <- function (x) {

## Apply the time.attr function to all objects listed by ls():
lapply(ls(), time.attr)

Hi

I know this subject has been mentioned before but from the mail archives 
I'm under the impression that this is not possible ?
I'm trying to carryout the equivalent of ls -l in R to give some 
date/time label to each of my objects

If the case is that there is no equivalent, is it possible to list all 
objects in an environment that share a common component ?
So that the common component is also displayed ?

I'm attempting to do the following

object$time <- Sys.time() for every object i've created
which although tedious appears to work

However I've no idea how if it is possible to list all the objects by $time
or extract the object name & $ time from all objects simultaneously so I 
can compare them.
Or am I just wasting my time ?

Apologies but my knowledge of R is limited at best ;-(
Any help would be fantastic and greatfully received

Cheers

Jason