crontab time compare
var CronTime = require('cron').CronTime;
var moment = require('moment');
var t = new CronTime('* * * * *');
var t2 = new CronTime('1 * * * *');
var now = moment();
var tasks = [t, t2]
for (var i = 0; i < tasks.length; i++) {
var task = moment(tasks[i].sendAt());
console.log(task.diff(now) < 60000 );
};
var task = moment(t.sendAt())