0551-student-attendance-record-i.js

/**
 * 551. Student Attendance Record I
 * https://leetcode.com/problems/student-attendance-record-i/
 * Difficulty: Easy
 *
 * You are given a string s representing an attendance record for a student
 * where each character signifies whether the student was absent, late, or
 * present on that day. The record only contains the following three characters:
 * - 'A': Absent.
 * - 'L': Late.
 * - 'P': Present.
 *
 * The student is eligible for an attendance award if they meet both of the following criteria:
 * - The student was absent ('A') for strictly fewer than 2 days total.
 * - The student was never late ('L') for 3 or more consecutive days.
 *
 * Return true if the student is eligible for an attendance award, or false otherwise.
 */

/**
 * @param {string} s
 * @return {boolean}
 */
var checkRecord = function(s) {
  return !s.includes('LLL') && (s.indexOf('A') === s.lastIndexOf('A'));
};