Leetcode 551 - Student attendance record I

Note:

  • Pretty easy regex problem
  • Remember to use g flag.

Question:

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.

Example:

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Input: s = "PPALLP"
Output: true
Explanation: The student has fewer than 2 absences and was never late 3 or more consecutive days.

Code:

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/**
* @param {string} s
* @return {boolean}
*/
var checkRecord = function(s) {
const regexA = s.match(/A/g);
const regexL = s.match(/(LLL)+/g);
return (regexA === null || regexA.length < 2) && regexL === null;
};