challenges-59.js

// #Question
// 2678. Number of Senior Citizens

// You are given a 0-indexed array of strings details. Each element of details provides information about a given passenger compressed into a string of length 15. The system is such that:

// The first ten characters consist of the phone number of passengers.
// The next character denotes the gender of the person.
// The following two characters are used to indicate the age of the person.
// The last two characters determine the seat allotted to that person.
// Return the number of passengers who are strictly more than 60 years old.

// Example 1:

// Input: details = ["7868190130M7522","5303914400F9211","9273338290F4010"]
// Output: 2
// Explanation: The passengers at indices 0, 1, and 2 have ages 75, 92, and 40. Thus, there are 2 people who are over 60 years old.
// Example 2:

// Input: details = ["1313579440F2036","2921522980M5644"]
// Output: 0
// Explanation: None of the passengers are older than 60.

// #Solution

var countSeniors = function (details) {
  let count = 0;
  details.forEach((d) => {
    const age = d.substring(11, 13);
    console.log(age);

    if (age > 60) count++;
  });
  return count;
};

countSeniors(["7868190130M7522", "5303914400F9211", "9273338290F4010"]);