I have a couple of functions that loop around the surrounding cells of a cell. The grid is contained inside an array.

In my code, I have checks to make sure it's not one of the edge cells, as checking an undefined cell causes an error.

As such, I have code like this:

if(x > 0) {
    var firstX = x - 1;
} else {
    var firstX = x;
}
if(x < 199) {
    var lastX = x + 1;
} else {
    var lastX = x;
}

if(y > 0) {
    var firstY = y - 1;
} else {
    var firstY = y;
}
if(y < 199) {
    var lastY = y + 1;
} else {
    var lastY = y;
}

A lot of lines of code to do very little. Is there a more elegant way to do this?