objarray foreach <variable_name> <obj> <body>
Do a loop over all elements of the objarray, on each iteration set the value of <variable_name> to the i-value and evaluate the script of the body, similar to a for or a foreach Tcl command
e.g.
set obj [objarray new intarray -values {5 6 7 8}] -> 5 6 7 8 objarray foreach x $obj { puts "x=$x" } -> x=5 x=6 x=7 x=8