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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
...wVersion)
This event fires when the database is downgraded. The previous and new version numbers are provided. Use this event to modify the database as required by the version change.
DatabaseOpened()
当数据库打开时，会触发此事件。
DatabaseUpgrade(oldVersion,newVersion)
This...
How can I remove a commit on GitHub? [duplicate]
...-i. For example, if it's your last commit, you can do git rebase -i HEAD~2 and delete the second line within the editor window that pops up.
Then, force push to GitHub by using git push origin +branchName --force
See Git Magic Chapter 5: Lessons of History - And Then Some for more information (i.e. ...
Can I change the height of an image in CSS :before/:after pseudo-elements?
...djusting the background-size is permitted. You still need to specify width and height of the block, however.
.pdflink:after {
background-image: url('/images/pdf.png');
background-size: 10px 20px;
display: inline-block;
width: 10px;
height: 20px;
content:"";
}
See the full...
How can I list all tags in my Git repository by the date they were created?
...
Sorting by tag creation date works with annotated and lightweight tags:
git for-each-ref --sort=creatordate --format '%(refname) %(creatordate)' refs/tags
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Stopping an Android app from console
Is it possible to stop an Android app from the console? Something like:
11 Answers
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Is there an equivalent for the Zip function in Clojure Core or Contrib?
... zipWith family for the common use case of tupling).
In contrast, Clojure and other Lisps have good support for variable arity functions; map is one of them and can be used for "tupling" in a manner similar to Haskell's
zipWith (\x y -> (x, y))
The idiomatic way to build a "tuple" in Clojure ...
How to remove focus border (outline) around text/input boxes? (Chrome) [duplicate]
...r elements such as DIV's used as modals. To prevent the highlight on those and all other elements as well, you can do:
*:focus {
outline: none;
}
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How to make overlay control above all other controls?
...ow is implemented in Silverlight. It overlays a semitransparent background and popup over your entire RootVisual.
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How to test if parameters exist in rails
I'm using an IF statement in Ruby on Rails to try and test if request parameters are set. Regardless of whether or not both parameters are set, the first part of the following if block gets triggered. How can I make this part ONLY get triggered if both params[:one] and params[:two] is set?
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How to use the pass statement?
I am in the process of learning Python and I have reached the section about the pass statement. The guide I'm using defines it as being a Null statement that is commonly used as a placeholder.
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