reverse

objarray reverse <obj> ?<blocksize>?

Reverse the order of the array.

<obj> the objarray to be reversed

<blocksize> optional integer >=1 and <=num items, to reverse by blocks of this size.

Warning: the values of <obj> itself are modified, without creating another copy of the object

e.g.

set obj [objarray new doublearray -values {3.5 2.1 0.3 3.5 2.6 0.3}]
-> 3.5 2.1 0.3 3.5 2.6 0.3
objarray reverse $obj
-> 0.3 2.6 3.5 0.3 2.1 3.5
# reverse again but as blocks of 2 items 
objarray reverse $obj 2
-> 2.1 3.5 3.5 0.3 0.3 2.6