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

Here is a working Javascript example from @seb original pseudo code:

function findingNeighbors(myArray, i, j) {
  var rowLimit = myArray.length-1;
  var columnLimit = myArray[0].length-1;

  for(var x = Math.max(0, i-1); x <= Math.min(i+1, rowLimit); x++) {
    for(var y = Math.max(0, j-1); y <= Math.min(j+1, columnLimit); y++) {
      if(x !== i || y !== j) {
        console.log(myArray[x][y]);
      }
    }
  }
}