objarray : incr

objarray incr <obj> ?<increment>? ?<index>?

Increment in $increment an item or all array items (default increment is 1)

<obj> the objarray to be modified

<increment> an integer value (1 by default)

<index> optional integer (starting from 0) to increment only the value of the array at this index

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