The at construct
If a is a distributed array, generally cannot write:
to assign element. 1, 4 not distributed indexes.
If x and y are the ranges of a, can write:
at (i = x )
at (j = y )
a [i, j] = 73 ;
at is the final special control construct of HPJava. Similar to onórestricts execution of body to processes holding specified location.