Is timezone info redundant provided that UTC timestamp is available?

a 夏天 提交于 2019-12-11 04:01:05
问题 I have a simple mobile app that schedules future events between people at a specified location. These events may be physical or virtual, so the time specified for the event may or may not be in the same timezone as the 'location' of the event. For example, a physical meeting may be scheduled for two people in London at local time 10am on a specified date. Alternatively, a Skype call may be scheduled for two people in different timezones at 4pm (in one person's timezone) on a specified date

Getting the next hour in java

核能气质少年 提交于 2019-12-11 03:35:35
问题 Please provide the code getting next hour from database. For example I am getting a timestamp from the database as: String sqlupdate = "select UploadedDate from CAF_Entry where Status='new' and Reference=0 order by UploadedDate limit 1"; System.out.println("sql query"+sqlupdate); Statement stupdate = con.createStatement(); ResultSet rsupdate = stupdate.executeQuery(sqlupdate); if(rsupdate.next()) { date22=rsupdate.getTimestamp("UploadedDate"); String stringdate=date22.toString();` I am

Can i set timestamp in ALSA?

删除回忆录丶 提交于 2019-12-11 03:22:16
问题 I am developing one application in which i need to play audio packets as per timestamp. For this i need to tell alsa driver at what timestamp my audio packet should get played. For this i need to set the timestamp of ALSA. I could find the alsa api to get the timestamp (snd_pcm_status_get_tstamp()) at which the audio packet are getting played. void gettimestamp(snd_pcm_t *handle, snd_timestamp_t *timestamp) { int err; snd_pcm_status_t *status; snd_pcm_status_alloca(&status); if ((err = snd

How can I use Perl to do datetime comparisons and calculate deltas?

左心房为你撑大大i 提交于 2019-12-11 03:03:00
问题 I extracted year, month, day, hour, minute, second, and millisecond data from human readable text (it wasn't in a timestamp format, but rather something like "X started at HH:MM:SS.SSS on DD MMM YYYY and ended at HH:MM:SS.SSSS on DD MMM YYYY"), so for each recorded event, I have each of the values. However, I need to turn those into some kind of timestamp so I can do math on it - I want to determine how long the event lasted (end time - start time). I was hoping the time function would take

Set time formatting on a datetime index when plotting Pandas Series

孤街浪徒 提交于 2019-12-11 02:38:48
问题 I have a Pandas Dataframe with a DatetimeIndex with a monthly ( M ) frequency. However, when I plot a column from this Dataframe the labels on my plot show a date and time even though these bits are meaningless. How can I fix this so that a month is only displaying in YYYY-MM format? 回答1: Make a small modification to your DateTimeIndex before plotting by converting them to PeriodIndex and providing a monthly frequency, like so - a.index = a.index.to_period('M') # Even a.index.astype('period[M

pandas output timestamps to_excel with microseconds

风流意气都作罢 提交于 2019-12-11 02:35:05
问题 I have microsecond resolution in my df which is very important but no matter what I try, I can't get excel to show microsecond resolution with either .xls or .xlsx. Any ideas on how to get them to display without converting to a string explicitly? 回答1: With the latest version of Pandas on GitHub (and in the soon to be released 0.13.1) you can specify the Excel date format in the ExcelWriter() like this: import pandas as pd from datetime import datetime df = pd.DataFrame([datetime(2014, 2, 1,

bash sort - how do I sort using timestamp

廉价感情. 提交于 2019-12-11 02:26:42
问题 I need to sort a file using shell sort in linux. The sort needs to be based on timestamp values contained within each of file's rows. The timestamps are of irregular format and don’t specify the leading zeros to months, days, etc, so the sorts I am performing are not correct (i.e. their format is “M/D/YYYY H:MI:S AM”; so so “10/12/2012 12:16:18 PM” comes before “7/24/2012 12:16:18 PM”, which comes before “7/24/2012 12:17:18 AM”). Is it possible to sort based on timestamps? I am using the

Nslog timestamp

我们两清 提交于 2019-12-11 02:26:27
问题 I want to nslog the device motion timestamp property . The device motion is in the class CMMotionManager.devicemotion.timestamp Any ideas. 回答1: Edit : Please see Nicolas Lauquin's answer. Per the comments, the following solution is not correct but is retained here for history (and because I can't delete it since it is currently marked accepted). The timestamp property is an NSTimeInterval , so you should be able to do: NSLog(@"Motion at time: %@", [NSDate

MySQL select based on daily timestamp range

时间秒杀一切 提交于 2019-12-11 02:19:51
问题 I am trying to select data from a table based on timestamps (stored as int(10)). The timestamps correspond to unix timestamps. I am using MySQL 5. Question : How can I select the data based on the following rule: get all records, where the timestamp is from 9 to 10 o'clock. Nothing else. Timestamp could be in the 70's or today. 回答1: If you're storing the value as a UNIX timestamp, you'll need to convert the value into MySQL's timestamp format before using the HOUR function. WHERE HOUR(FROM

Finding updated entry with Entity Framework Timestamp using code first

ぐ巨炮叔叔 提交于 2019-12-11 02:12:19
问题 One of my models, let's call it "Comment" has a timestamp column/member I had defined it originally as: [Required] public DateTime Timestamp { get; set; } I had some methods in other parts of my code that would get the latest comments after a specific time, so it would grab all comments with a timestamp greater than some value. I recently came across an article by Julie Lerman about the timestamp data annotation for entity framework (http://msdn.microsoft.com/en-US/data/jj591583#c