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How do I rename a column in a SQLite database table?
...nd also within all indexes, triggers, and views that reference the column. If the column name change would result in a semantic ambiguity in a trigger or view, then the RENAME COLUMN fails with an error and no changes are applied.
Image source: https://www.sqlite.org/images/syntax/alter-table-stm...
Generate full SQL script from EF 5 Code First Migrations
...d -To parameter to generate an update script to update a database to a specific version.
Script-Migration -From 20190101011200_Initial-Migration -To 20190101021200_Migration-2
https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/#generate-sql-scripts
There are several options to th...
RSpec vs Cucumber (RSpec stories) [closed]
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If you haven't already, you might want to check out Dan North's excellent article, What's in a Story? as a starting point.
We have two main uses for Cucumber stories. First, because the story form is very specific it helps f...
How can I center an absolutely positioned element in a div?
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what if user has scrolled the page down, overylay appears on the top, do you think it will be a good idea to use jquery to fix scroll issue
– PUG
Sep 1 '12 at 5:45
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iOS 7 - Failing to instantiate default view controller
...r project settings, change your "Main Interface" to the new Main_iPhoneV2 (If it's your iPad and you're writing a universal app, you'll have to edit the -Info.plist and look for the value "Main storyboard file base name (iPad)
Recompile, and stop pulling your hair out
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Rails find record with zero has_many records associated [duplicate]
...he's using that to his advantage to check whether a required database identifier is present. If it's not, then there was no record on the photos side of the join. You could also use photos: {id: nil} if that is more clear.
– Javid Jamae
Dec 8 '15 at 18:28
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Android: Align button to bottom-right of screen using FrameLayout?
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Actually it's possible, despite what's being said in other answers. If you have a FrameLayout, and want to position a child item to the bottom, you can use android:layout_gravity="bottom" and that is going to align that child to the bottom of the FrameLayout.
I know it works because I'm usi...
Difference between json.js and json2.js
Can someone tell me what the difference is between the 2 JSON parsers?
3 Answers
3
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How to call a method with a separate thread in Java?
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}
}
Take a look at Java's concurrency tutorial to get started.
If your method is going to be called frequently, then it may not be worth creating a new thread each time, as this is an expensive operation. It would probably be best to use a thread pool of some sort. Have a look at Future,...
Is there a way to rollback my last push to Git? [duplicate]
... commit, force push to the repo, then go back again - remove the last step if you don't care about the commit )
Without doing any changes to your local repo, you can also do something like:
git push -f origin <sha_of_previous_commit>:master
Generally, in published repos, it is safer to do ...