Array2D.surrounds = function()

in slides/asset/common/Array2D.js [2058:2077]

• 17 lines of code
• 20 McCabe index (conditional complexity)

  Array2D.surrounds = function(grid, r, c, allowOutOfBounds) {
    var surrounds = [];

    var d = Array2D.dimensions(grid);
    var w = d[0];
    var h = d[1];
    var right = w - 1;
    var bottm = h - 1;

    if ((r > 0 && c > 0)         || allowOutOfBounds) surrounds.push([r - 1, c - 1]); // nw
    if ((r > 0)                  || allowOutOfBounds) surrounds.push([r - 1, c]); // n
    if ((r > 0 && c < right)     || allowOutOfBounds) surrounds.push([r - 1, c + 1]); // ne
    if ((c > 0)                  || allowOutOfBounds) surrounds.push([r, c - 1]); // w
    if ((c < right)              || allowOutOfBounds) surrounds.push([r, c + 1]); // e
    if ((r < bottm && c > 0)     || allowOutOfBounds) surrounds.push([r + 1, c - 1]); // sw
    if ((r < bottm)              || allowOutOfBounds) surrounds.push([r + 1, c]); // s
    if ((r < bottm && c < right) || allowOutOfBounds) surrounds.push([r + 1, c + 1]); // se

    return surrounds;
  };