text: export default class expressionUtils {
      static arr = [
          {"cron": "0 0 2 1 * ?", "desc": "Indicates that the task is adjusted at 2 am on the 1st of each month."},
          // {"cron": "0 15 10 ? *", "desc": "MON-FRI means to perform homework every day from 10:15 am Monday to Friday."},
          // {
          //     "cron": "0 15 10 ? 6L 2002-2006",
          //     "desc": "Represents the implementation of the last Friday of each month of 2002-2006 at 10:15 am"
          // },
          {"cron": "0 0 10,14,16 * * ?", "desc": "Every day at 10 am, 2 pm, 4 pm"},
          {"cron": "0 0/30 9-17 * * ?", "desc": "Every half hour during nine to five working hours"},
          // {"cron": "0 0 12 ? *", "desc": "WED means every Wednesday at 12 noon"},
          {"cron": "0 0 12 * * ?", "desc": "Trigger every day at 12 noon"},
          {"cron": "0 15 10 ? * *", "desc": "Trigger every day at 10:15 am"},
          // {"cron": "0 15 10 * * ? 2005", "desc": "2005 every day at 10:15 am"},
          {"cron": "0 * 14 * * ?", "desc": "Trigger every 1 minute between 2 pm and 2:59 pm"},
          {"cron": "0 0/5 14 * * ?", "desc": "Trigger every 5 minutes between 2 pm and 2:55 pm"},
          {"cron": "0 0/5 14,18 * * ?", "desc": "Trigger every 5 minutes between 2 pm and 2:55 pm and 6 pm to 6:55 pm"},
          // {"cron": "0 15 10 L * ?", "desc": "Trigger at 10:15 am on the last day of each month"},
          // {"cron": "0 15 10 ? * 6L", "desc": "Trigger at 10:15 am on the last Friday of each month"},
          // {"cron": "0 15 10 ? * 6#3", "desc": "Trigger at 10:15 am on the third Friday of each month"},
  
  
      ];
  
      static getAllExpression() {
          expressionUtils.arr.sort(function (a, b) {
              return expressionUtils.sortFunction(a.cron, b.cron)
          })
          return expressionUtils.arr
  
      }
  
      static sortFunction(s, t) {
  
          let a = s.toLowerCase();
          let b = t.toLowerCase();
          if (a < b) return -1;
          if (a > b) return 1;
          return 0;
  
      }
  }
  