unix-timestamp

I'm using the Mongo shell to query my Mongo db. I want to use the timestamp contained in the ObjectID as part of my query and also as a column to extract into output. I have setup Mongo to create ObjectIDs on its own. My problem is I can not find out how to work with the ObjectID to extract its timestamp. Here are the queries I am trying to get working. The 'createdDate' field is a placeholder; not sure what the correct field is: //Find everything created since 1/1/2011 db.myCollection.find({date: {$gt: new Date(2011,1,1)}}); //Find everything and return their createdDates db.myCollection.find

Code first echo time() . '<br/>'; echo date('Y-m-d H:i:s') . '<br/>'; date_default_timezone_set('America/New_York'); echo time() . '<br/>'; print_r($timezones[$timezone] . '<br/>'); echo date('Y-m-d H:i:s') . '<br/>'; In the above code the date is printed according to timezone but unix timestamp is same even after setting default timezone How can we print unix timestamp according to timezone? Cecil Zorg The answer provided by Volkerk (that says timestamps are meant to be always UTC based) is correct, but if you really need a workaround (to make timezone based timestamps) look at my example. <

In a model I have a such field: mydate = models.DateField() now a javascript graph function requires unix timestamp such as "1196550000000", how can I return the unix timestamp of my mydate input. Thanks edit: please check the second answer, it has a much better solution In python code, you can do this to convert a date or datetime to the Unix Epoch import time epoch = int(time.mktime(mydate.timetuple())*1000) This doesn't work in a Django template though, so you need a custom filter, e.g: import time from django import template register = template.Library() @register.filter def epoch(value):

This question already has an answer here: How can I convert a Unix timestamp to DateTime and vice versa? 16 answers I am trying to get the GMT in unix time. I use the following code: public static long GetGMTInMS() { var unixTime = DateTime.Now.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc); return (long)unixTime.TotalMilliseconds; } To then convert the unix time back to a DatTime object, I use this: public static DateTime UnixTimeStampToDateTime(double unixTimeStamp) { System.DateTime dtDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0); dtDateTime = dtDateTime

I have a millisecond timestamp that I need to convert from a String to long. Javascript has a parseInt but not a parseLong . So how can I do this? Thanks Edit: To expand on my question slightly: given that apparently javascript doesn't have a long type, how can I do simple arithmetic with longs that are initially expressed as strings? E.g subtract one from the other to get a time delta? JavaScript has a Number type which is a 64 bit floating point number*. If you're looking to convert a string to a number, use either parseInt or parseFloat . If using parseInt , I'd recommend always passing the

The ObjectId used as the default key in mongodb documents has embedded timestamp (calling objectid.generation_time returns a datetime object). So it is possible to use this generation time instead of keeping a separate creation timestamp? How will you be able to sort by creation time or query for the last N items efficiently using this embedded timestamp? Andrew Orsich I suppose since MongoDB ObjectId contain a timestamp, you can sort by 'created date' if you will sort by objectId: items.find.sort( [['_id', -1]] ) // get all items desc by created date. And if you want last 30 created items you