longestString.js

// Write a function that takes an array of strings and return the longest string in the array.

// For example:
// const strings1 = ['short', 'really, really long!', 'medium'];
// console.log(longestString(strings1)); // <--- 'really, really long!'

// Edge case: If you had an array which had two "longest" strings of equal length, your function should just return the first one.

// For example:
// const strings2 = ['short', 'first long string!!', 'medium', 'abcdefghijklmnopqr'];
// console.log(longestString(strings2)); // <--- 'first long string!'

function longestString(arr) {
  let longestString = arr.reduce(
    (a, b) => (a.length > b.length || a.length == b.length ? a : b),
    ""
  );

  return longestString;
}

const strings1 = ["short", "really, really long!", "medium"];