text: export function checkType(arr) {
    var sequence = [1,2,3,4,5,6,7,8,9];
    var counter = 0;
    for (var i=0; i < 9; i++) {
      if (typeof arr[i] === "number") {
        counter += 1 ;
      }
    }
    if (counter === 9) {
      arr = arr.sort();
      for (var j=0; j < 9; j++) {
        if (arr[j] === 0) {
          return "has zero";
        } else if (arr[j] > 9) {
          return "greater than nine";
        } else if (arr.join() !== sequence.join()) {
          return "repeating numbers";
        }
        return "nine numbers";
      }
    }
  }
  
  
  
  
  
  // Sequence.prototype.checkType = function() {
  //   if ((typeof this.num1 === "number") && (typeof this.num2 === "number") && (typeof this.num3 === "number") && (typeof this.num4 === "number")) {
  //     return "numbers";
  //     if ((typeof this.num5 === "number") && (typeof this.num6 === "number") && (typeof this.num7 === "number") && (typeof this.num8 === "number") && (typeof this.num9 === "number"))
  //   } else {
  //     false
  //   }
  // }
  // };
  
  // num1, num2, num3, num4, num5, num6, num7, num8, num9
  // this.num1 = num1;
  // this.num2 = num2;
  // this.num3 = num3;
  // this.num4 = num4;
  // this.num5 = num5;
  // this.num6 = num6;
  // this.num7 = num7;
  // this.num8 = num8;
  // this.num9 = num9;
  
  
  // for (var i=1; i <= 9; i++) {
  //   var number = num.concat(i);
  //   if (typeof Sequence.number = "number") {
  //     true
  //   } else {
  //     return false
  //   }
  // }
  