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What are -moz- and -webkit-? [duplicate]
...ithout breaking
pages that depend on -ms-grid.
UPDATE AS OF THE YEAR 2016
As this post 3 years old, it's important to mention that now most vendors do understand that these prefixes are just creating un-necessary duplicate code and that the situation where you need to specify 3 different CSS ...
Postgres: INSERT if does not exist already
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Postgres 9.5 (released since 2016-01-07) offers an "upsert" command, also known as an ON CONFLICT clause to INSERT:
INSERT ... ON CONFLICT DO NOTHING/UPDATE
It solves many of the subtle problems you can run into when using concurrent operation, which ...
How to calculate the number of days between two dates? [duplicate]
...; secondDate.setHours(0, 0, 0); This way you can say daysBetween(new Date(2016,1,10,15), new Date(2016,1,11))); and still come up with 1 day difference.
– Howard
Feb 10 '16 at 13:37
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Why is document.write considered a “bad practice”?
...s if the user is on a 2G connection. See developers.google.com/web/updates/2016/08/…
– Flimm
Jul 12 '17 at 15:13
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Merge pull request to a different branch than default, in Github
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As of 15.08.2016 GitHub allows changing the target branch of a pull request via the GUI. Click Edit next to the title, then select the branch from the dropdown.
You can now change the base branch of an open pull request. After you...
What is the Swift equivalent to Objective-C's “@synchronized”?
... Great article from Matt Gallagher about this: cocoawithlove.com/blog/2016/06/02/threads-and-mutexes.html
– wuf810
Jul 29 '16 at 11:50
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How can a web application send push notifications to iOS devices? [closed]
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as of 02/2016,FF,Chrome and Safari can register for push from webapp.
– Yvon Huynh
Feb 10 '16 at 9:56
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What's the simplest way to subtract a month from a date in Python?
...created_datetime__lt - relativedelta(months=1) Out[23]: datetime.datetime(2016, 11, 29, 0, 0, tzinfo=<StaticTzInfo 'Etc/GMT-8'>) In [24]: created_datetime__lt - relativedelta(month=1) Out[24]: datetime.datetime(2016, 1, 29, 0, 0, tzinfo=<StaticTzInfo 'Etc/GMT-8'>)
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Android 4.1: How to check notifications are disabled for the application?
...e Project lead for the new notifications declares that you can't.
Edit
2016 update: Now you can check it, as said in this Google I/O 2016 video.
Use NotificationManagerCompat.areNotificationsEnabled(), from support library, to check if notifications are blocked on API 19+. The versions below AP...
How do I drop a foreign key constraint only if it exists in sql server?
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In SQL Server 2016 you can use DROP IF EXISTS:
CREATE TABLE t(id int primary key,
parentid int
constraint tpartnt foreign key references t(id))
GO
ALTER TABLE t
DROP CONSTRAINT IF EXISTS tpartnt
GO
DROP...