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keydown to trigger the css change of <a>, open a link in new tab, and rollback to the previous css status of <a


keydown to trigger the css change of <a>, open a link in new tab, and rollback to the previous css status of <a

By : user2951292
Date : November 18 2020, 01:01 AM


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Is it a better practice to explicitly call transaction rollback or let an exception trigger an implicit rollback?

Is it a better practice to explicitly call transaction rollback or let an exception trigger an implicit rollback?


By : user3209144
Date : March 29 2020, 07:55 AM
this will help Former. If you look up MSND samples on similar topics, like TransactionScope, they all favor the implicit rollback. There are various reasons for that, but I'll just give you a very simple one: by the time you catch the exception, the transaction may had already rolled back. Many errors rollback the pending transaction and then they return control to the client, where the ADO.Net raises the CLR SqlException after the transaction was already rolled back on the server (1205 DEADLOCK is the typical example of such an error), so the explicit Rollback() call is, at best, a no-op, and at worse an error. The provider of the DbTransaction (eg. SqlTransaction) should know how to handle this case, eg. because there is explicit chat between the server and the client notifying of the fact that the transaction rolled back already, and the Dispose() method does the right thing.
A second reason is that transactions can be nested, but the semantics of ROLLBACK are that one rollback rolls back all transactions, so you only need to call it once (unlike Commit() which commits only the inner most transaction and has to be called paired up for each begin). Again, Dispose() does the right thing.
Does a rollback inside a INSERT AFTER or UPDATE AFTER trigger rollback the entire transaction

Does a rollback inside a INSERT AFTER or UPDATE AFTER trigger rollback the entire transaction


By : Михаил Дзык
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Yes it will rollback the entire transaction.
It's all in the docs (see Remarks). Note the comment I've emphasised - that's pretty important I would say!!
How do I trigger a save as pop-up on clicking of a link? Specifically, how do I trigger than MIME type change?

How do I trigger a save as pop-up on clicking of a link? Specifically, how do I trigger than MIME type change?


By : BaneSaurabh
Date : March 29 2020, 07:55 AM
this one helps. The method of the request has little to do with it. Your request will trigger a response from the server which in turn serves up the file.
It could be a something like www.site.com/serveFile.php?file=foo.txt. Where you are specifying the file to serve up as a GET parameter.
Status bar back to previous app from multiple open apps

Status bar back to previous app from multiple open apps


By : LMWBXR
Date : March 29 2020, 07:55 AM
I hope this helps you . This is standard iOS behavior. When one app launches another app, iOS shows the previous app in the status bar to make it easy for the user to return to the previous app.
So if App A launches App B, while in App B the user will see the reference to App A in the status bar. If App B then launches App C, the status bar updates to show App B in the status bar.
Oracle query to show change of status in each row with previous status

Oracle query to show change of status in each row with previous status


By : Naoto Hori
Date : March 29 2020, 07:55 AM
hop of those help? I have a table with following rows , You can use lag():
code :
select proj_name, prev_status || ' to ' || status
from (select t.*, lag(status) over (partition by proj_name order by date) as prev_status
      from t
     ) t
where prev_status is not null;
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