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App Inventor 2 中的响应式设计 · App Inventor 2 中文网
...erent screen sizes and resolutions. This gives good results, but it makes more work for developers. App Inventor uses a simpler approach, but that approach is more limited in terms of the kinds of apps it can handle.
1. Specifying sizes as percentages
There’s one important rule when using App I...
Recommended website resolution (width and height)? [closed]
...that support this.
Treat mobile as a first-class citizen. You are getting more traffic from mobile devices all the time. These introduce even more screen sizes. You can still optimize for 960, but using responsive web design techniques means your page will adjust based on the screen size.
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How to select rows with no matching entry in another table?
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will this work even if table1 has more records then table2? if table1 has 100 records and table2 has 200 records (100 that match/join and 100 that don't match/join) would we get all 200 records returned?
– Juan Velez
Aug...
How do I use Nant/Ant naming patterns?
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The rules are:
a single star (*) matches zero or more characters within a path name
a double star (**) matches zero or more characters across directory levels
a question mark (?) matches exactly one character within a path name
Another way to think about it is double star...
std::vector versus std::array in C++
...(it's passed as a template parameter), and it cannot grow or shrink.
It's more limited than std::vector, but it's often more efficient, especially for small sizes, because in practice it's mostly a lightweight wrapper around a C-style array. However, it's more secure, since the implicit conversion ...
Rails: create on has_one association
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A more concise way to do this is with:
@user.create_shop(params[:shop])
See methods added by has_one in the Ruby on Rails guides.
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Validate uniqueness of multiple columns
... can pass multiple scope params in case you need to validate uniqueness on more than 2 fields. I.e. :scope => [:friend_id, :group_id]
– Dave Rapin
May 2 '11 at 16:36
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Best practice: ordering of public/protected/private within the class definition?
...esn't cause the reader to need to jump around the code too much. This is a more sensible way to organize code rather than by access modifier.
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How do you create a static class in C++?
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