Algorithm/snippet to get odd item in two arrays

snip.js

function removal(cA,bA) {
  var count = 0;
  for (var i = 0; i < cA.length; i++) {
    if (i < 0) continue;
    for (var j = 0; j < bA.length; j++) {
      if (i < 0 || j < 0) continue;
      count++;
      console.log('comparing', i, j, cA[i], bA[j]);
      if (cA[i] == bA[j]) {
        console.log('removed', i, j, cA[i], bA[j]);
        bA.splice(j, 1);
        cA.splice(i, 1);
        i = i - 1;
        j = j - 1;
      }
    }
  }

  console.log(cA, bA);
  console.log(count);
}