JSTests/test262/harness/compareArray.js

//-----------------------------------------------------------------------------
function compareArray(a, b) {
  if (b.length !== a.length) {
    return false;
  }

  for (var i = 0; i < a.length; i++) {
    if (b[i] !== a[i]) {
      return false;
    }
  }
  return true;
}