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What are the differences between the different saving methods in Hibernate?
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║ ║ sets id if doesn't ║ sets new id even if object ║
║ save() ║ exist, persists to db, ║ already has it, persists ║
║ ║ returns attached object ║ to DB, returns atta...
App Inventor 2 扩展 · App Inventor 2 中文网
...ilding an extension component. These are detailed in the sections below:
Set up a local version of App Inventor for your own use, building a simple extension component for it, as practice.
Build your desired component for your local instance and test it carefully.
Generate an aix file, so that the...
How to initialize a JavaScript Date to a particular time zone
...ing and I want to convert this to the local time. But, I don't know how to set the timezone in the Date object.
13 Answers
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Counting DISTINCT over multiple columns
...d, provided the column is deterministic and you are using "sane" database settings, it can be indexed and / or statistics can be created on it.
I believe a distinct count of the computed column would be equivalent to your query.
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Prevent browser caching of AJAX call result
...ed, regardless of which jQuery method you use ($.get, $.ajax, etc.)
$.ajaxSetup({ cache: false });
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Google Chrome form autofill and its yellow background
...nt.
input:-webkit-autofill {
-webkit-box-shadow: 0 0 0 1000px white inset !important;
}
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psql: FATAL: role “postgres” does not exist
...he same as on my Ubuntu system for the superuser postgres. So I think your setup simple uses user as the superuser. So you could try this command to login:
sudo -u user psql user
If user is really the DB superuser you can create another DB superuser and a private, empty database for him:
CREATE ...
Change key pair for ec2 instance
...nd This might be out of place but you seem to know how this all works... I set up an EC2 instance today and received the private key .pem file on my Mac, however ssh -i key.pem does not authenticate (permission denied (publickey)). In the EC2 Management Console under Key Pair Name it lists nothing. ...
How to get .app file of a xcode application
...isioning Profile and get the WWDR certificate and finally change the build settings in Xcode after all the certificates were in place. See here
But after much fun I am now looking at my first app on my iPad :) - btw, for getting apps into the app store you need to create a app store Distribution P...
How to turn off the Eclipse code formatter for certain sections of Java code?
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So in addition to setting the "Never Join Lines" option I also have to write these "phantom" comments? Shouldn't the "Never Join Lines" part work by itself?
– Greg Mattes
Nov 30 '09 at 18:32
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