Finding neighbours in a two-dimensional array

Question

Is there an easy way of finding the neighbours (that is, the eight elements around an element) of an element in a two-dimensional array? Short of just subtracting and adding

Answer 1

array[i][j] has neighbors

array[i-1][j]
array[i][j-1]
array[i-1][j-1]
array[i+1][j]
array[i][j+1]
array[i+1][j+1]
array[i+1][j-1]
array[i-1][j+1]

That's probably the fastest/easiest way is to just list all possible neighbors. Make sure to do index out of bound checking though.

Some languages might offer a shortcut way of doing this, but I don't know of any.