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Scala: What is a TypeTag and how do I use it?
All I know about TypeTags is that they somehow replaced Manifests. Information on the Internet is scarce and doesn't provide me with a good sense of the subject.
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What's the difference between a catalog and a schema in a relational database?
...think schema were the "upper wrapper" object before the database itself.
I mean DB.schema.<what_ever_object_name_under_schema> .
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What is the correct answer for cout
...rantees that all side effects of previous evaluations will have been performed at sequence points. There are no sequence points in between function arguments evaluation which means that argument a can be evaluated before argument std::operator<<(std::cout, a++) or after. So the result of the a...
The relationship could not be changed because one or more of the foreign-key properties is non-nulla
...ntity and then set the collection of child entities to my new list which comes from the MVC view.
20 Answers
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Understanding slice notation
...art:stop:step] # start through not past stop, by step
The key point to remember is that the :stop value represents the first value that is not in the selected slice. So, the difference between stop and start is the number of elements selected (if step is 1, the default).
The other feature is that...
Making a div vertically scrollable using CSS
...urrent line, a horizontal scrollbar won't be created (unless it's on an element that has word-wrapping disabled). For the vertical bar,it will allow the content to expand up to the height you have specified. If it exceeds that height, it will show a vertical scrollbar to view the rest of the content...
Proper SCSS Asset Structure in Rails
So, I have an app/assets/stylesheets/ directory structure that looks something like this:
5 Answers
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Is it ever advantageous to use 'goto' in a language that supports loops and functions? If so, why?
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There are a few reasons for using the "goto" statement that I'm aware of (some have spoken to this already):
Cleanly exiting a function
Often in a function, you may allocate resources and need to exit in multiple places. Programmers can simplify their code by putting the ...
What is Cache-Control: private?
... date]
Cache-Control: max-age=[seconds]
The server kindly asked any intermediate proxies to not cache the contents (i.e. the item should only be cached in a private cache, i.e. only on your own local machine):
Cache-Control: private
But the server forgot to include any sort of caching hints:
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What are the mathematical/computational principles behind this game?
My kids have this fun game called Spot It! The game constraints (as best I can describe) are:
9 Answers
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