datetime

问题 I am new to R and I am an avid SAS programmer and am just having a difficult time wrapping my head around R. Within a data frame I have a date time column formatted as a POSIXct with the following the column appearing as "2013-01-01 00:53:00" . I would like to create a date column using a function that extracts the date and a column to extract the hour. In an ideal world I would like to be able to extract the date, year, day, month, time and hour all within the data frame to create these

问题 private void showdataTable_btnActionPerformed(java.awt.event.ActionEvent evt) { try { DateFormat df = new SimpleDateFormat("YYYY-mm-dd'T'HH:MM:ss'Z'"); //set date format String set = df.format(dateChoos1.getDate()); //add value to set BasicDBObject whereQuery = new BasicDBObject(); whereQuery.put("datetimes", set); //where date via set(date) DBCursor cursor = table.find(whereQuery); while (cursor.hasNext()) { DBObject obj = cursor.next(); String ip_address = (String) obj.get("ip_address");

问题 I'm seeing behavior on Chrome where the return value for a 12:00 pm time formatted with hours12 set to true comes out as 0 pm. Shouldn't it be 12? If not, what's the proper way to display a 12 hour clock? Note that I'm constrained to using ES5. The following in Chrome prints 0 pm: var foo = new Date(2020, 0, 1, 12, 0, 0) var bar = new Intl.DateTimeFormat("en-GB", {hour12: true, hour: "numeric"}).format(foo) console.log(bar) Note that the value of bar is '0 pm'. Other languages besides en-GB

问题 I have a csv file consisting of last 3 years of timeseries monthly data. Based on today's date, I would like to read only the previous 2 years of data for forecasting the future. Data file example (has data from 01-01-15 to 31-10-19): Date,Value 01-01-17,2 01-02-17,5 01-03-17,8 01-04-17,4 01-05-17,2 01-06-17,9 01-07-17,8 01-08-17,7 01-09-17,5 01-10-17,1 01-11-17,2 01-12-17,3 01-01-18,5 01-02-18,6 01-03-18,8 01-04-18,2 01-05-18,5 01-06-18,6 Desired result: If today's date is 01/01/19, I want

问题 I have a csv file consisting of last 3 years of timeseries monthly data. Based on today's date, I would like to read only the previous 2 years of data for forecasting the future. Data file example (has data from 01-01-15 to 31-10-19): Date,Value 01-01-17,2 01-02-17,5 01-03-17,8 01-04-17,4 01-05-17,2 01-06-17,9 01-07-17,8 01-08-17,7 01-09-17,5 01-10-17,1 01-11-17,2 01-12-17,3 01-01-18,5 01-02-18,6 01-03-18,8 01-04-18,2 01-05-18,5 01-06-18,6 Desired result: If today's date is 01/01/19, I want

问题 What would be a possible way to update labels that displays static time received once from API.I have a tableView where each cell displays city name current temperature and time just like the native iPhone WeatherApp.Is there a way to observe the device clock minutes so I can trigger some code to update the times when a minute goes by? 回答1: You can subclass a UILabel and add a timer to it so that it autoupdates itself: Considering your last question where you get the timeZone offset from GMT

问题 When I save dates in my database Django shows message about succesfull adding with the right time but in fact in the databese time is different models.py: from datetime import datetime from django.db import models class Teg1(models.Model): created_at = models.DateTimeField(default=datetime.now, null=True, blank=True, editable=False) num = models.FloatField(default=0.0, null=True, blank=True) def __str__(self): return str(self.num) + " || " + str(self.created_at) settings.py TIME_ZONE = 'Asia

问题 I am using Modal for reminder date for task. The current date and the days before it has to be disabled so that the User can select the pick-up date starting next day inorder to Mark reminder with his specified task. for this I am using input type : <input type="datetime-local" class="form-control" autocomplete="off" id="actionreminderdate" /> If I use below java script it works for input type "Date" But not for Datetime-local. $(function(){ var dtToday = new Date(); var month = dtToday

问题 so I have label that display time in HH:mm format. and that label will be updated periodically in every one minute. I can do that actually by using timer like the code below class HomeVC: UIViewController { @IBOutlet var timeLabel: UILabel! private var timer = Timer() private var timeBase = Date() override func viewDidLoad() { super.viewDidLoad() setTime() } } extension HomeVC { //MARK: - Method related to time func setTime() { activateTimer() timeLabel.text = dateTimeService.convert(date:

问题 so I have label that display time in HH:mm format. and that label will be updated periodically in every one minute. I can do that actually by using timer like the code below class HomeVC: UIViewController { @IBOutlet var timeLabel: UILabel! private var timer = Timer() private var timeBase = Date() override func viewDidLoad() { super.viewDidLoad() setTime() } } extension HomeVC { //MARK: - Method related to time func setTime() { activateTimer() timeLabel.text = dateTimeService.convert(date: