day46.js

function findNeedle(haystack) {
  return `found the needle at position ${haystack.indexOf('needle')}`;
}

console.log(
  findNeedle([
    '3',
    '123124234',
    undefined,
    'needle',
    'world',
    'hay',
    2,
    '3',
    true,
    false,
  ])
); // returns 'found the needle at position 3'

console.log(
  findNeedle([
    '283497238987234',
    'a dog',
    'a cat',
    'some random junk',
    'a piece of hay',
    'needle',
    'something somebody lost a while ago',
  ])
); // returns 'found the needle at position 5'

console.log(
  findNeedle([
    1,
    2,
    3,
    4,
    5,
    6,
    7,
    8,
    8,
    7,
    5,
    4,
    3,
    4,
    5,
    6,
    67,
    5,
    5,
    3,
    3,
    4,
    2,
    34,
    234,
    23,
    4,
    234,
    324,
    324,
    'needle',
    1,
    2,
    3,
    4,
    5,
    5,
    6,
    5,
    4,
    32,
    3,
    45,
    54,
  ])
); // returns 'found the needle at position 30'