All files / algorithms/lib/findOUtlier findOUtlier.ts

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100% Functions 1/1
100% Lines 27/27

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// You are given an array(which will have a length of at least 3, but could be very large) containing integers.
// The array is either entirely comprised of odd integers or entirely comprised of even integers except for a single integer 
// N.Write a method that takes the array as an argument and returns this "outlier" N.
//
//
// [2, 4, 0, 100, 4, 11, 2602, 36] -->  11 (the only odd number)
 
// [160, 3, 1719, 19, 11, 13, -21] --> 160 (the only even number)
//
//
 
 
// export function findOUtlier(integers: number[]): number {
 
//   const isEvenNum = integers.filter(num => num % 2 == 0);
//   const isOddNum = integers.filter(num => num % 2 != 0);
 
//   return isEvenNum.length == 1 ? Number(isEvenNum) : Number(isOddNum);
// };
 
export function findOUtlier(integers: number[]): number {
  const evenNum: number[] = [];
  const oddNum: number[] = [];
  const middle = Math.trunc(integers.length / 2);
  let end = integers.length - 1;
  let start = 0;
 
  while (start < middle || end >= middle) {
 
    if (start !== middle) {
      if (!(integers[start] % 2)) {
        evenNum.push(integers[start])
      } else {
        oddNum.push(integers[start])
      }
    }
 
 
    if (!(integers[end] % 2)) {
      evenNum.push(integers[end])
    } else {
      oddNum.push(integers[end])
    }
 
    if (evenNum.length === 1 && oddNum.length > 1 || oddNum.length === 1 && evenNum.length > 1) {
      break;
    }
 
    start++;
    end--;
  }
 
 
  return evenNum.length === 1 ? evenNum[0] : oddNum[0];
};