static equals(arrA, arrB) {
    if (arrA.length !== arrB.length) {
      return false;
    }

    let tmpA = arrA.slice().sort();
    let tmpB = arrB.slice().sort();

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

    return true;
  }
Returns a boolean indicating whether or not the two arrays contain the same elements.
Only supports 1d, non-nested arrays.

@static
@param {Array} arrA An array.
@param {Array} arrB An array.
@returns {Boolean} A boolean indicating whether or not the two arrays contain the same elements.