Search using Array.prototype.reduce method.

reduce-search.js

// refer to http://ariya.ofilabs.com/2013/10/searching-using-array-prototype-reduce.html?utm_source=javascriptweekly&utm_medium=email
// old story
function findLongest(entries) {
  for (var i = 0, longest = ''; i < entries.length; ++i) 
    if (entries[i].length > longest.length) longest = entries[i];
  return longest;
}

// A version which relies on reduce is a single statement:
function findLongest2(entries) {
  return entries.reduce(function (longest, entry) {
    return entry.length > longest.length ? entry : longest;
  }, '');
}