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Automatic creation date for Django model form objects?
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You can use the auto_now and auto_now_add options for updated_at and created_at respectively.
class MyModel(models.Model):
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
...
Get person's age in Ruby
I'd like to get a person's age from its birthday. now - birthday / 365 doesn't work, because some years have 366 days. I came up with the following code:
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C# List of objects, how do I get the sum of a property
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for(int i = 0; i < f; ++i)
{
p[i] = i % 2;
}
var time = DateTime.Now;
p.Sum();
Console.WriteLine(DateTime.Now - time);
int x = 0;
time = DateTime.Now;
foreach(var item in p){
x += item;
}
Console.WriteLine(DateTime.Now - time);
x = 0;
time = DateTime.Now;
for(int i = 0, j = f; i < ...
Set a DateTime database field to “Now”
...s with SQL parameters. It I set a DateTime parameter to the value DateTime.Now, what will my request look like ?
3 Answers
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Using current time in UTC as default value in PostgreSQL
...orary table test(
id int,
ts timestamp without time zone default (now() at time zone 'utc')
);
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How to convert date to timestamp?
...Script/Reference/Global_Objects/…. I just forgot to put away the string. Now it works.
– antonjs
Mar 26 '12 at 13:52
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Convert datetime object to a String of date only in Python
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use t = datetime.datetime.now() to use current date
– gizzmole
Jul 17 '17 at 18:36
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What's the standard way to work with dates and times in Scala? Should I use Java types or there are
... longer maintained.
import com.github.nscala_time.time.Imports._
DateTime.now // returns org.joda.time.DateTime = 2009-04-27T13:25:42.659-07:00
DateTime.now.hour(2).minute(45).second(10) // returns org.joda.time.DateTime = 2009-04-27T02:45:10.313-07:00
DateTime.now + 2.months // returns org.joda....
How do I get elapsed time in milliseconds in Ruby?
...time_diff_milli(start, finish)
(finish - start) * 1000.0
end
t1 = Time.now
# arbitrary elapsed time
t2 = Time.now
msecs = time_diff_milli t1, t2
You will need to decide whether to truncate that or not.
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MySQL get the date n days ago as a timestamp
...B will do part of it depending on what you want
mysql> SELECT DATE_SUB(NOW(), INTERVAL 30 day);
2009-06-07 21:55:09
mysql> SELECT TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
2009-06-07 21:55:09
mysql> SELECT UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
1244433347
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