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function deepSearch(arr, num) {
  var str = arr.toString();
  var newArr = str.split(',');
  return (~newArr.indexOf(num + '')) ? true : false;
}
console.log(deepSearch([1, 2, 3, 4, 5], 3));
// true
console.log(deepSearch([1, 2, 3, 4, 5], 8));
// false
console.log(deepSearch([1, 2, [3, 7, [22, [23]], 4, 5], 17], 8));
// false
console.log(deepSearch([1, 2, [3, 7, [22, [23]], 4, 5], 17], 7));
// true
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anonymouspro
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